johnt@seila.UUCP (john grant) (07/12/90)
The title really says it all - every accelerated Mac (classic) that I have seen has badly distorted sound when running accelerated, is there a board that leaves the sound as it should be ? John
gt4586c@prism.gatech.EDU (WILLETT,THOMAS CARTER) (07/13/90)
In article <632@seila.UUCP>, johnt@seila.UUCP (john grant) writes: > > The title really says it all - every accelerated Mac (classic) that > I have seen has badly distorted sound when running accelerated, is there > a board that leaves the sound as it should be ? > I have used the Radius Accelerator 16 in my SE. It comes with an init which corrects the sound output. The error comes from the accelerator running at 16MHz while the sound driver on the motherboard is still geared for 8MHz. The only problem with the Radius accelerators is that I think all of them are based on the 68020. I don't think they have put out a 68030 based accelerator yet, and you can't install a PMMU into their 68020 accelerator board. They really should put out an '030 version since MacPluses and SEs are limited to 4MB of RAM on their motherboard, hence making the ability to use virtual memory a virtual necessity for memory hungry users. -- thomas willett Georgia Institute of Technology, Atlanta gt4586c@prism.gatech.edu "Violence is the last refuge of the incompetent." - Salvor Hardin (Foundation)
lemke@radius.com (Steve Lemke) (07/31/90)
gt4586c@prism.gatech.EDU (WILLETT,THOMAS CARTER) writes: }In article <632@seila.UUCP>, johnt@seila.UUCP (john grant) writes: }> }> The title really says it all - every accelerated Mac (classic) that }> I have seen has badly distorted sound when running accelerated, is there }> a board that leaves the sound as it should be ? }> } I have used the Radius Accelerator 16 in my SE. It comes with an init } which corrects the sound output. The error comes from the accelerator } running at 16MHz while the sound driver on the motherboard is still } geared for 8MHz. And, last Friday (7/27/90) I just released a new version (2.8) of our Accelerator INIT which (for the most part) makes significantly improves the quality of digitized sound playback on the Accelerator 16 for the Mac Plus. In addition, it allows users with Radius Plus Accelerators to print to the H.P. DeskWriter without getting a "Datacomm buffer overrun" error message on the printer. If you have been suffering from either of these problems, you'll want to contact your Radius dealer to find out about getting the new Accelerator INIT version 2.8. In addition, it will be posted in our area on CompuServe and also on AppleLink (as usual). If these are inconvenient for you, then send me email and tell me that you'd like me to post it to comp.binaries.mac in which case I'll submit it for distribution - it's not very large. In fact, since it's less than 3K, I could even (A) email it to interested people, or (B) post it to comp.sys.mac.hardware if there's enough interest. --Steve -- ----- Steve Lemke, Engineering Quality Assurance, Radius Inc., San Jose ----- ----- Reply to: lemke@radius.com (Note: NEW domain-style address!!) -----