First post, by BEEN_Nath_58
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Windows had sound acceleration levels, such as None, Full, Basic etc. But what was their functions?
previously known as Discrete_BOB_058
Reply 1 of 5, by Joseph_Joestar
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IIRC, the sound acceleration slider was added (or at least made visible to the user) with DirectX 7.
In the old days, some sound cards (mostly mid 90s ISA stuff) had crappy drivers which caused popping/crackling in games that used DirectSound. Turning this slider down a notch (or more) could sometimes help with that.
Reply 2 of 5, by Shponglefan
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I recently tested this with an Audigy 2 ZS card. Full acceleration includes all hardware acceleration including EAX. Turning it down a notch to Standard disables EAX.
Turning it all the way down disables all hardware acceleration (which I'm assuming includes h/w mixing) and resulted in stuttering of audio playback.
I'm not sure of what the Basic level does in this case.
Reply 3 of 5, by BEEN_Nath_58
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Joseph_Joestar wrote on 2024-03-17, 10:09:IIRC, the sound acceleration slider was added (or at least made visible to the user) with DirectX 7.
In the old days, some sound cards (mostly mid 90s ISA stuff) had crappy drivers which caused popping/crackling in games that used DirectSound. Turning this slider down a notch (or more) could sometimes help with that.
I remember some games would stop crashing if you turned down acceleration to Basic, I think Heretic 2 was one of them, and it was pre DX7. I wonder how that happens? Not that the game was getting problematic with enabling EAX or A3D
Shponglefan wrote on 2024-03-17, 13:13:I recently tested this with an Audigy 2 ZS card. Full acceleration includes all hardware acceleration including EAX. Turning it down a notch to Standard disables EAX.
Turning it all the way down disables all hardware acceleration (which I'm assuming includes h/w mixing) and resulted in stuttering of audio playback.
I'm not sure of what the Basic level does in this case.
What happened in case of non-EAX/non-A3D cards? What would AC97/HD audio do?
previously known as Discrete_BOB_058
Reply 4 of 5, by Shponglefan
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BEEN_Nath_58 wrote on 2024-03-17, 13:51:What happened in case of non-EAX/non-A3D cards? What would AC97/HD audio do?
Haven't tested that.
Reply 5 of 5, by BEEN_Nath_58
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Shponglefan wrote on 2024-03-17, 14:01:BEEN_Nath_58 wrote on 2024-03-17, 13:51:What happened in case of non-EAX/non-A3D cards? What would AC97/HD audio do?
Haven't tested that.
Got an MS article which say
None: Complete DSound emulation (same as in WinVista+?)
Basic: Dsound emulation of secondary sound buffers only
Standard: Complete Dsound minus EAX/A3D etc stuff
Full: Everything possible
previously known as Discrete_BOB_058