Audio/Video Stuttering Issues on the 6400/6500
This page contains a growing list of issues related to audio and video stuttering with tips to prevent them. At first it seemed that only Sonnets L2 G3 upgrade was the cause but now it seems that the 6400 in general has stuttering problems and G3 upgrades only intensify them. The 6500 is less prone to audio or video stuttering but there are a few instances that can cause this problem even on the it. I only hope that by posting this info, I can help prevent some of you from getting the problem!
Not everyone has these issues but many do, which is why I now gave this problem its own page :(
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1/28/2000 Flash: Sonnet says OS 8.5 fixes the issue! I do have several Sonnet users confirming that updating to OS 8.5 or newer fixes the sound issues. It is a costly fix but the price for OS 8.5 has come down since it was first released so it might be worth trying now.
Bill is having a tough time getting Avid to do anything but crash since he installed Sonnets G3. Please email him any suggestions you may have. Also let me know when a fix is found. Thanks
[Thanx for your quick reply. Without the Crescendo extensions it works fine, so I feel It must be the G3 upgrade. With it on, it freezes as soon as you point at almost anything. I was hoping it would work with the G3 because of the speed.
I did hit the reset button after installing the card.
Can you find out if there is any software available to make it work with the G3? I looked in the Avid web site but couldn't find anything.
Thank you so much for your help
I asked him to try the latest version 1.1.5 and the U3 extension. Here is his reply.
Thanks. Found it, downloaded it, installed the extension, now I can import a movie but when I go to edit and try to play the movie, it freezes. Hope you can find a solution. I understand you don't have Avid Cinema, but I can see you are very knowledgeable so hopefully you can help.
Glad I found yo
7/10/1999 A real problem found with Sonnets G3: Most of us have been having the startup crashes or random freezes with Sonnets G3 but now it seems there is a repeatable problem with Sonnets cards and some sound apps. Peter wrote to Sonnet with some issues he was having and Sonnet told him to return the card as they are aware of these issues! I wonder when they were going to tell us? Thanks Peter. Peter would like to hear from anyone else who is having similar issues and so would I. Thanks
You will be very interested in this letter I eventually received from Sonnet. There IS after all a major issue with these cards. Why they have taken this long to admit it is a mystery... but at least they have admitted it!!! Feel free to post this on your fabulous site.
Letter from Sonnet....
Reply to: RE: Problem with Crescendo G3/L2 300Mhz/1Mb on a 6400/200.
I hate to be the one to break it to you, but it seems to be time to get a G3. We have been receiving emails and calls from customers with sound problem, especially with Cubase. Our engineers are aware of the problem, and I will forward your letter to them to add to my proof that Cubase isn't working with the G3 processors.
I am sorry that I can't help you on this one, but our G3 cards are not compatible with Cubase. Please return your card to the reseller you purchased it from, and get a refund. If you purchased the card directly from Sonnet, please send your invoice number in your reply email and I will issue an return authorization number.
On 7/6/99, Peter and Tracey wrote:
Problem with Crescendo G3/L2 300Mhz/1Mb on a 6400/200.Hi... I purchased your Crescendo G3/L2 300Mhz/1Mb a little while ago and have had persistent problems when running certain applications. Booting is 100% ok. Speed and general operation is 100% ok. Generally freeze free and stable (and temperature nice and cool too @ 23-31 c'grade).
Pretty good so far :)
However..... now the boring stuff... :( I use the computer for music and media ( I know it's not the best.. but v. tight budget)
When running Quicktime movies sporadic stuttering (and yup my discs are not fragmented and my scsi terminations are ok).
When running audio/midi sequencer applications such as Cubase VST (www.steinberg.net) , which is my main app (and the reason I bought your card to get faster performence) the audio processing part of the app. is unusable. When running audio into the recording/DSP side of the app , the audio always freezes into a 'stuck cd ' style loop after a few seconds.
The actual DSP part of the program seems to be operating smoothly and there seems to be no strain on the G3 processor. The 'freezing is happening around the ASIO part. I have tried to use both the Apple Sound Manager and the 'low
level' DAV driver but the results are the same. It feels like a timing issue of some sort. It's so frustrating as everything else about your card is great !!!!
Are other users having this problem? Any tips? Am I doomed to having to buy a new mac?
I have tried other similar applications (e.g. StudioVision Pro from www.opcode.com) and they seem to do the exactly the same thing too so it's not just 'cubase'.
I have tried working on a 'bare-bones' system folder and also removing the 'Mac Picasso' video card but the problems still remain.
Also if I remove your Crescendo card (or disable your extension Ver 1.36) the problem goes away completely.
I really really look forward to hearing from you......
(and I hope this mail made sense)
7/23/1999 More sound issues with Sonnets G3's: Regis reports he is having Audio Buffer not ready errors when trying to record sound after his G3 upgrade. Click here to read more on these issues.
[Tom, I have the same sound problem as other sonnet L2/G3 users, with Performer sound program. Everything is all right with midi or with audio play back. But each time I try to do audio recording , I have the message : "Audio buffer not ready". As I do just a few of music and jus with midi, I'm not going to throw away the card which is working well for all the other things. But anyway there is really a problem. Also, I have a funny thing with some games as Unreal: periodically the game freeze and I have ti plug and unplug the headphone jack to have it run.
Thanks for your site.
7/30/1999 More reader feedback on the Sound issues with Sonnets G3: Jeff writes with his problems with Sonnets G3. Thanks Jeff.
I have seen some of these same Sound Issues with the Sonnet cards. I have a 6400, running the Mac OS 8.5.1 with Sonnet's 300mhz 1MB card. Some Midi only audio apps run fine, others stutter and choke all over the place. I've seen the problem with Aiff's, WAV's, MP3's, etc., but seldom when playing midi files. I wrote to Sonnet two months ago an had a reply that said they were relaying the issue to their Quality Dept. and would get back to me if they figure any thing out. So Far, I've heard nothing else from them. For the most part the card works great. Freezes and Crashes during extension load are very rare now with v1.3.7. But this sound problem seems to persist. If I disable the card, Audio works with no problems, but this is too slow and not practical especially since the disabled Sonnet card leaves me with no L2 Cache. I'm hearing this stuttering in QT4, Tech Tool Pro 2, SoundApp PPC, but not in Band in a Box, or Ballade. This is odd, because Ballade is a very old program Version 1.0 written in 1992 and it has no problems at all.
I really enjoy reading your great and very informative web site.
Thanks for keeping us informed.
8/1/1999 More reports on sound issues with Sonnets G3: Jeff is having similar issues to other with his Sonnet G3 but it was just a stutering or skipping and not crashing his system. I suggested he try PowerLogix's G3 cache utility to disable his cache and see if that would clear up the problem. I have a link to PowerLogix's site on my Hack Sonnets Crescendo page. Thanks Jeff.
Thanks for your suggestion. I downloaded the PowerLogix G3 utility as you suggested and disabled the cache. There seemed to be some improvement but this still didn't clear up the problem entirely. The audio errors are very subtle and could be missed if you're not listening very closely. I also tried setting the cache speed ratio at 120 MHz or 5:2. I thought I had read where Sonnet had designed something into this card to prohibit the cache speed adjustments. But it does seem to work better at this setting. I recently received another response from Sonnet that said they are aware of this sound problem and are working on a fix. They said to watch the Sonnet site for an extension update sometime in the near future that should resolve this issue.
Travis is having the more severe crashing issues while playing sound apps with his Sonnet G3. I might also suggest that instead of turning the cache off that they try disabling Speculative Addressing which is what my Hack was for. Maybe it will help even with the Crescendo version 1.3.7 which seems to be pretty stable otherwise?
Regarding the news posted by Jeff on your site, I will agree that there is a sound problem with the Sonnet cards. mine is a 300/512, all mp3 players will eventually crash, and lock up my system sometimes it takes 30 seconds sometime 15 minutes but all mp3 players crash with the Crescendo extension enabled with 8.5, 8.5.1, and 8.6. I have tried various versions of Apple's sound manager extension, the only music I can play is through my cd drive no cd has crashed to date, lastly Civ II gold also crashes with certain sound effects at random. Nothing crashes with the G3 turned off, but what fun is that.
Thanks for your time,
8/7/1999 More info on the Sound issue with Sonnets G3: Egan who is a professional sound recorder sent along some interesting info. Most of it is beyond me as I'm not into digital recording but I hope it helps those of you that are. Thanks Egan. Click here to read a text version of his letters. They are pretty long but pack a lot of info.
I emailed about the Sound quality issue he noted about lowering the system volume actually decreases the quality and not just lowering the volume and here is his reply (also added to the text info)
[> I had no idea that lowering the system volume actually lowers audio quality?
> How weird? I'll definitly post that. Is that with all Macs?
Yes ALL Mac's! Even-say you have an alert, a sexy female vioce.....it will sound Aweful & Cracking if you simply lower the main volume on it. (I Know- Most people go Wierd, must be corrupt or something) All Mac's...... a Warning would be nice huh? ;-)]
So anyone wanting the best sound out better turn up the volume and then lower it in all other apps and games or get a set of external speakers and plug them into the front headphone port and use thhe volume knob on the speakers. don't use the back port as it cuts out all low end bass which is passed only to the internal speaker. the headphone jack on the 6400 passes the full range of audio. for a system that was advertised as an audio/video system with certian setups, it sure is a pesty little Mac :)
8/14/1999 More info on the Sound issue with Sonnets G3: Jeff was having stuttering issues and other problems with his Sonnet G3 accelerated 6400 and finally found the problem on his system.
Good news here,
I read the messages you had posted from Egan, and began wondering why I was still having these audio problems while he was not. I made some minor adjustments along the lines of some of the items he had discussed and things were seeming to get even worse. Then I noticed that every audio blip, crackle, or pause seemed to coincide with a small flash of light at my Global Village External Modem. As it turns out, the Global Village, Global Fax 2.6.8 software queries the modem frequently to sense any incoming fax messages. So, once I disabled the Global Fax software, then no more audio problems. HooRay. Incoming fax messages are something I can live without. Now if I can just solve the problem with the occasional random freezes when I access some of the pull down menus, then I'll be one happy camper and Sonnet will have one satisfied customer. These freezes seem like they might just be related to the speculative addressing issue you've discussed. I may want to try your hack.
Although I doubt this is the cause on most other peoples 6400's, it is something to consider. Jeff later wrote to let me know that the Apple Platinum Sounds in the Appearance Conrol Panel was causing the random crashes for him. I have this info posted on my OS 8.5 info page and interestingly it was sent to me by another Jeff :)
I couldn't find anywhere to simply turn off the GV software other than just disabling it in Extensions Manager. It is no big issue with me, I almost never use the fax functions anyway. My random freeze issues seem to have disappeared now that I have turned off Platinum Sounds. I read on your web site that this has solved that problem for others. As of now everything seems to be stable and I've seen no freezes since making those changes. I haven't tried the Hack. I'm just as happy to live without the Platinum Sounds. I've also returned to the regular 150 mhz speed for my 1 MB of cache. Everything else in my system is performing perfectly. This 6400 G3 300 seems to be faster than ever now. I'm hesitant to upgrade to 8.6. Although it sounds as though it has been great for most people.
Thanks again for the great web site. You've help me fix the problems that had been dogging my 6400.
11/4/1999 Update on sound issues with Sonnets G3: A Sonnet G3 user wrote to let me know he found that VM being on or the sound quality in the Monitors & Sound control panel set at 44Khz caused his garbled sound. Thanks. Click here to read more on this topic.
[The CD audio is fine, but the breakup on MP3 audio could be partly due to the hard drive. Of course, it was fine before the upgrade - go figure. And it only happens when online. Sonnet thanked me for tracking down why it happened (VM or 44 kHz) but didn't offer any solutions and it's a small price to pay for the massive improvement in usability.]
12/10/1999 Possible fix for Sonnet issues with Sound apps?: ken writes that Sonnet told him that older OS's are the cause of this problem? And for him, updating to at least OS 8.5.1 solved his problem. Thanks Ken. This is a pretty costly fix but may be worth it if you can't stand the freezes!
[Hi. I am updating you on my efforts to solve the problem with Quicktime and other sound applications that cause freezes with Sonnet's G3/L2 card. I sent an email to Sonnet tech support about this. They replied telling me that this is a known issue with MacOS 8.0/8.1 (I was using 8.1) and that the problem is not present with 8.5/8.6
So I went and got 8.5.1 and indeed, no more QT or sound app freezes! Nevertheless, I wish that they had documented this somewhere.
So now, with MacOS 8.5.1 and with ROAM extension, my G3 card zooms along trouble free.
12/17/1999 Another tip on fixing sound issues with Sonnets G3: Gary found a few extensions that seem to make his system more stable if removed. Thanks Gary.
I was going through my extension folder and came across three extensions that had been there seance 1997, I think they were for an early version of real player, I don't know so I disabled them to see what happens...... I don't use real player any more to unstable on my Mac. Well guess what, the sound issues I've had with QuickTime are gone....So I turn them back on in the extension manger, restart and QuickTime sound problem is back (the sound skips and stutters). Turn them off, problem is gone. Maybe this will help some of your other readers with Sonnet cards that have sound issues. If they have them turn them off if they need them, turn them back on....They are
MSL Runtime PPC++.DLL
MSL Runtime PPC.DLL
Just so you know. I have these on both my PB G3 and my Vimage 6400 and neither have sound issues. They were installed by my AGFA camera software. Let me know if you have these and removing them helped.
1/16/2000 OS 8.5 really does seem to fix the sound issues with Sonnets L2 G3: Earlier I had posted info that Sonnet recommends OS 8.5 to clear sound issues you might have while using their L2 G3 cards. David writes that it did cure his sound issues with QuickTime by upgrading to OS 8.5. Thanks David.
Wow, it was so easy, just updated to MacOs 8.5 and now my G3-250 upgraded 6400 works great. No more Quicktime problems, no boot problems. I wonder why Sonnet doesn't show 8.5 and the minimum OS for the upgrade......
2/18/2000 OS 9 may fix sound issues with Sonnets G3?: Regis writes that after updating to OS 9 his sound issues with Performer and his Sonnet G3 have gone away. Thanks Regis. Sonnet has said that OS 8.5.x is needed to get rid of these issues also but a lot of OS 8.6 users seem to have the problem back.
[Well, after the bad news about OS9 and my 6400, the good news: with OS9, the sound issue I had with Performer 6.02 and sonnet crescendo 300/1M had gone (previously, with OS 8.6 I could'nt record audio, even with crescendo last extension). So I think I will go with OS9, but it seems to be very important to have all the softwares well installed and with there last versions. I have to throw away ATM 4.5 to speed up video display. Virtual PC 3.0 seems to works greatly and rapidly with OS9 and sonnet crescendo. Thanks for your site.
He latter wrote me this.
My choice is to update to OS 9 because it fix the sound issue and it's too hard to have 2 different OS at a time. Disk slowdown stop with 5.0.2 Norton updater on line, so I think it's a good thing that all OS 9 user made this update, if they have Norton 5.0 or 5.0.1. For the video slowdown, ATM was one reason but I think the Formac card is another, I will check this with them and I let you know. I already use sonnet 1.4.1 with sonnet clocker, up to 320 Mhz and it works well. I think I will let go my idea to work with the video slot, because I don't want to go back to stock 6400 video. It's just too slow. Bye and thanks for your site.]
3/18/2000 Fixing sound issues with L2 G3's installed: I read a posting on Accelerate Your Mac's web site that suggested turning off VM or reducing the sound rate from 44Khz to 22Khz might solve the problem? If this works for you then please let me know.
3/24/2000 Apples PCI Timing Extension to help fix L2 G3 audio issues: I have had several reports now that the PCI Timing Extension made for Power Computings clones help fix instability with audio apps on L2 G3 upgraded Macs.
9/9/2000 Update on G3 upgrades and Audio apps having issues: Here is some info I found on Accelerate Your Macs web site from a company that does not support G3 upgrades with their audio apps! Seems like this issue is much more serious then with just L2 G3 upgrades!
2/10/2001 6400 mother board clocked caused sound issue and possible fix?: A reader of my site that had clocked his mother board found he got audio stuttering issue afterwards. He then noticed that if a CD was inserted (any type) that the stuttering stopped! Thanks for the info. I was wondering if this might also help others with ATI Rage128 cards or G3 upgrades that have audio issues? Please let me know. Thanks
3/23/2001 Sound issues caused by USB support extension?: If you read Thomas's letter below, he says that the USB Support Extension caused sound that seem very similar to the sound stuttering issues with ATI Rage128 cards and Sonnet G3 upgrades installed? He said that just removing the USB Support Extension fixes it but then your USB devices no longer work :( I don't know if I have this problem or not as I don't play any intense games on the 6400 anymore and I have no other sound issues that I am aware of? If you are having sound issues and removing the USB Support Extensions fixes it, please email me the info. Thanks.
Apple TIL on high sound volumes causing skipping?: Below is a TIL that basically says that in OS 8.1, if you have the volume on your Mac set to full or near full that sounds may skip. Also it states that having the input source set to nothing may induce the same issue? Updating to OS 8.5 is supposed to stop that. I wonder if it doesn't fix it for everyone? Could this be the solution for some of us with sound issues on our 6400/6500's? Please email me if lowering your sound volume or changing the input source fixes your problems. Thanks.
4/21/2001 Voodoo5 fixes audio stuttering issues with Sonnet G3: Bryan reports that replacing an ATI Rage128 with a Voodoo5 card fixed the audio issues he had with games and having a Sonnet G3 upgrade. Thanks Bryan.
I still believe its an issue with the 6400 as well as the ATI Rage128 because G3 and G4 systems do not have this problem. Not even systems like the 7500 or 9600. It is some issue with the 6400 which is amplified with the introduction of Sonnets G3. Now ATi also has some issue with their Rage128 that gets affected by this where newer or older versions are not? The RagePro as well as the Radeon both seem to not be affected, as well as other cards like the Voodoo4/5. The Voodoo3 is in the same boat as the Rage128. Some people have no issues and other have some issues? Needless to say, it sounds like getting an even newer video card is the fix :)
10/5/2001 Causes of audio issues on the 6400/6500: I thought I would compile some of the issues that I have gathered as causing audio issues to help you make better upgrade choices.
As you can see, we are pretty limited to what may work 100% but even I won't guarantee that as I am sure there a some people out there with one of the above in use and not having any issues. The above are mainly some suggestions on things to look out for when upgrading your 6400/6500. I know this severely limits your upgrade ability (specially in OS's) so just remember that if you use one of the above items that you could introduce audio issues in games and audio apps like MP3 players.
The 6500 is less prone to audio issues but it has its own problems with some of the above items. Rage128 cards may not work period on the 6500 and FW/USB combo cards need a PRAM patch to work or the FW ports or the entire card may not function. From what I know, Sonnets FW/USB card and OrangeMirco's FW/USB card comes with this patch. And VM can affect any Mac not running OSX as I have found :(
10/21/2001 Sonnet ATA/100 card and their new software do reduce audio stutter!: Now I don't have info on their software working on a 6400 or a 6500 yet but Accelerate Your Mac had some info posted from a 7500 owner who said it got rid of his audio issues completely! This is good news and maybe it will help us as well? But you will sacrifice some performance for this as the software slows the drive access down some to accomplish this :( Here is the info from Accelerate's site.
External FW drive helps audio stuttering issues for one 6400 owner!: Joel wrote to say that he was able to reduce his audio stuttering on his 6400 by placing the iTunes app on a Firewire connected HD but he left the MP3 files on the internal HD. Thanks Joel. If you read his email, you will see that he has every piece of hardware known that causes audio stuttering, yet he was able to reduce it by just having the iTunes app on an external drive! It may be that any other drive other then the boot up drive may help as Ralph had written in the past saying when he booted to a SCSI drive, his audio issues went away, and I bet his iTunes app was on the stock IDE drive. This may be the fix we have been looking for?
I would like to hear from anyone that can verify this trick. Try running iTunes from any drive that is not the boot drive and see what happens. Thanks. I must admit that this might be the case as I have been having an issue with iMovie on my B&W G3 where when exporting to video from a FW HD, my internal HD starts to do some kind of access as I hear it start a rhythmic clicking and that causes the video on my monitor to skip but thankfully the video on the tape is unharmed! I then tried moving the iMovie app to my FW drive and I did not have that clicking anymore and the screen never skipped anymore? Very strange. iTunes may have the same problem?
I suggest turning off Virtual Memory to fix the skip when the HD is accessed while saving or loading apps. That has worked for me on my B&W G3 and iBook.
Another possible fix for audio stuttering: This fix comes from Tupring. He says that playing a certain QT movie fixes it for him until he reboots? Interesting. Thanks Tupring.
11/4/2001 Audio stuttering with MacPicasso 540 video card: Fabounio writes that he has audio stuttering issues when moving windows around the desktop if 2D acceleration is enabled on his MacPicasso 540 video card. Thanks for the info Fabounio.
Has anyone else had this type of audio issue? If so then please write me. Thanks!
11/18/2001 Sound issues using different video cards: Francois did some extensive testing with different video cards regarding sound stuttering and sent me his findings. Thanks Francois!
Well it seems that many video cards will cause sound stuttering in different situations! But the good part at least is that the best of them all does not have this problem (ATI Radeon).
12/2/2001 Sonnet Tango card causing audio stuttering on a 6400: Victor writes that his 6400 was free of audio issues until he installed Sonnets Tango firewire/USB card. He was able to fix it by removing the USB drivers but that's not a great solution so he finally gave up and removed the card. Thanks for the info Victor. This makes the second person to confirm that Sonnets Tango card causes this issue :(
1/19/2002 ATI Radeon video card may not be immune from audio stuttering for all?: There is a thread on my forums started from a 6400 user who says his Mac is having audio issues even with a Radeon card. Also a 6500 owner says he was completely unsuccessful at getting the Radeon card to even work as long as acceleration was turned on! Seems there just might not be any cure at all for the 6400 regarding audio stuttering and high end video cards or USB cards :( One user swore that just installing a 6500 mother board would fix it. But if the 6500 cannot run a modern video card, what's the point :(
Audio issues - something to think about: I read on a Mac help site the other day that OS 9 and up use a different path for audio CD's then traditionally used on older Macs. They now take the audio right through the SCSI bus (or IDE if you have a Mac with an IDE CD-ROM) instead of using the audio cable directly to the mother board. This is supposed to keep the audio cleaner before it gets to the amplifier. But this also means the CPU is doing work it never did before. Here is a snippet from what I read.
Is it possible that this is the entire problem for us? Since not everyone sees the problem could it be those games that use CD audio tracks that cause the biggest problem. Does it even work this way on older Macs that where upgraded to OS 9? One way to check is to remove the audio adaptor from the back of your CD-ROM and see if audio CD's still play. Maybe the answer is to downgrade to an older OS? But that means only OS 8.6 as that is the only older OS that can run USB devices and barely at that! I would like to hear from you if you test this theory or have your own opinion. Thanks
2/9/2002 Update on CDROM audio coming from the drive bus rather then the audio cable: Richard did some tests to prove my hypothesis that CD audio now comes from the SCSI bus (or IDE bus on IDE attached CDROMS) instead of the audio cable. He was using OS 9.1. Thanks Richard.
Well it appears that I was correct in that CD Audio is now routed through the drives interface bus instead of the audio cable. This means if you are running OS 9 and iTunes, you no longer need to worry about whether the audio cable will attach to any third party CDROM drive. But the reason I had asked is because I think this may be yet another cause of audio stuttering. If the audio is passed through the bus to be processed by the CPU then this is another bit of data dragging the CPU down :(
4/7/2002 QT 5 has significant issues with MIDI playback: I found this info on the MacInTouch web site.
4/27/02 Tango patch 1.2 fixes some audio stuttering but inserting a CD seems the overall fix?: Corry has a 6400 with the Sonnet Tango FW/USB card installed. He decided to try the PRAM patch that is meant for the 6500 to see if it would have any affect on his system. He used the latest version (1.2) and says it reduced the stuttering a lot! Later he noted though that inserting a CD in the drive connected to his SCSI bus has the best results on reducing the stuttering! Thanks for the info Corry.
Later he wrote this.
I replied to him with this.
My issue was if you placed the B&W to sleep and then woke it up, it would respond very slowly unless you inserted a ZIP disk. Reverting to the CD/DVD 1.4.3 extension fixed that. So these are a few fixes for you guys to try.
The patch might be worth trying even if you do not own the Tango card as its not supposed to be needed for the 6400 but he is using it with no issues that he noted. If anyone tries these, please email me your results. Thanks.
6/7/2002 Sonnet gave up on fixing L2 G3 cards causing audio stuttering issues!: John wrote to let me know about his problems with Sonnets L2 G3 causing audio issues as many other people have found. He asked Sonnet for help and eventually they gave up and told him to return the card :( Sigh! Thanks for the info John.
Personally I do not think the issue was with the Tango card in Johns case. I believe the issue was with the ATI video card as others have mentioned. John just happened to remove both the video card and the Tango card at the same time. But it could really be the issue of Apples USB drivers being used with the Tango card causing his problem. It has mostly been 6500 owners experiencing this problem as mentioned above. Could this be the first incident of the Tango card causing issues on the 6400 as well?
7/14/2002 Booting from a SCSI HD may cure some audio stuttering issues?: Jose wrote to say that he tried a suggestion that was posted on this site about booting to a SCSI HD instead of the IDE HD to fix audio stuttering issues. He tried this on a Beige G3 which was giving him problems and says it worked great! Thanks for the info Jose.
So for those of you that have access to a SCSI HD and have audio stuttering issues, you may want to give this a try.
11/2/2002 Audio stuttering fixed by using a USB audio out device!: Luc just wrote to say that his audio stuttering problems have been fixed by using the audio output from his iMic. Thanks for the info Luc.
I asked him if he had to switch the audio out in the Sound control panel or if it did that automatically. Here is his reply.
Please email me if you try this yourself. Thanks.
12/16/2002 Confirmation that USB audio out devices do fix audio stuttering!: Kirschen and Scott both wrote to say that audio out from the iMic does not have stuttering problems like the stock audio out has. Thanks guys.
Its possible that older apps like Apples CD Audio Player do not recognize the USB drivers for audio output? Also the CD Audio Player does not gets its input from a digital source. It actually gets its input from the audio cable off the back of the CDROM drive. iTunes however takes the data off the CDROM over the SCSI bus and then will either play it out your stock speakers or through a USB audio out device if you have one. So it seems we have a cure for those with some money to spend on a USB card and USB audio out devices :(
1/9/2003 Evergreen FireWire/USB combo card does not have stuttering issues as Sonnets Tango card does: John wrote to let me know that he tried Evergreens combo card based on info I had posted earlier from another Evergreen user stating that it had no stuttering issues when used with a L2 G3 upgrade. John also found that it eliminated stuttering issues he had due to his Tango card. Thanks John. Click here and scroll to the end of the Evergreen section to read Johns message.
12/22/2003 Partial Solution to audio skipping with USB drivers enabled: Combo card owners have had lots of issues with audio skipping due to the USB drivers being installed. The previous solution was to disable the USB drivers and reboot so you could listen to music without skipping but that's not the best solution. Simon may have come up with a better solution for those of you that have non-Apple CDROM drives attached. Thanks Simon.
I believe the issue is the way Apple polls all the drives every now and then. This causes enough of a CPU lag to make audio skip. It sounds like Toasts CD driver does not poll the drive as often as Apples does or may do it in a less CPU tasking way?
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This page last updated 1/31/2004