Re: Multichannel Audio
- From: "Chris P. [MVP]" <msdn@xxxxxxxxxxxx>
- Date: Fri, 14 Oct 2005 15:43:52 -0400
On Fri, 14 Oct 2005 19:56:38 +0200, Pjotr wrote:
> I'm afraid I'm cuurently working on a soundblaster audigy... I guess
> it's time to buy a real multichannel soundcard to develop a new application.
> I need at least five channels channels and I have to be able to change
> the speed/pitch and the volume.
> I'd prefer to use DirectSOund, otherwise I have to completely rewrite my
> application....:(
>
> Any suggestion for a brand or soundcard capable of using multiple
> channels????
I'm afraid I haven't seen any that support multi-channel and pitch/speed
control at the same time.
Changing the volume on the wave data is simple multiplication against the
sample values. I have software volume control stage in my software.
Pitch/speed control can also be done is software, fairly easily if you
don't mind pitch and speed being tied together. Remove 1 of 100 samples to
increase speed 1%, insert a duplicate sample every 100 to decrease speed
1%. Adjust the ratio according to the speed change desired. This works
well for speeds between 50% and 200%, beyond that you have to go to higher
quality sine-spline interpolation.
.
- Follow-Ups:
- Re: Multichannel Audio
- From: PjotrvA
- Re: Multichannel Audio
- References:
- Multichannel Audio
- From: PjotrvA
- Re: Multichannel Audio
- From: PjotrvA
- Re: Multichannel Audio
- From: Chris P. [MVP]
- Re: Multichannel Audio
- From: Pjotr
- Multichannel Audio
- Prev by Date: Re: callback function immediatly called with an empty buffer
- Next by Date: Hooking Problems
- Previous by thread: Re: Multichannel Audio
- Next by thread: Re: Multichannel Audio
- Index(es):
Relevant Pages
|
