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sound card sampling speed
Posted: Sun Mar 06, 2005 5:35 pm
by chippy73
I need to change ie read and write the sound card sampling rate.
I am sure there is an API for it but for the life of me I can't find it!
Any help welcomed.
Alan
Posted: Mon Mar 07, 2005 8:16 pm
by eriansa
ASIO?
Posted: Tue Mar 08, 2005 7:51 am
by chippy73
What's ASIO?
Did a search on win32,hlp and it didn't find any reference to it.
Alan
Posted: Wed Mar 23, 2005 10:12 am
by chippy73
Here is how I solved the problem of changing the sampling speed of the soundcard.
Code: Select all
OpenLibrary(1,"winmm.dll")
Structure WAVEFORMATEX
wFormatTag.w
nChannels.w
nSamplesPerSec.l
nAvgBytesPerSec.l
nBlockAlign.w
wBitsPerSample.w
cbSize.w
EndStructure
Global waveheader1.WAVEHDR
Global waveform.WAVEFORMATEX
Procedure changesample(sample$)
waveform\wFormatTag = #WAVE_FORMAT_PCM
waveform\nChannels = 1
waveform\nSamplesPerSec = Val(sample$)
waveform\wBitsPerSample = 8
waveform\nBlockAlign = waveform\nChannels * waveform\wBitsPerSample / 8
waveform\nAvgBytesPerSec = waveform\nSamplesPerSec * waveform\nBlockAlign
waveform\cbSize=0
dwRet.l=CallFunction(1,"waveInOpen",@wavehandle, #WAVE_MAPPER, @waveform,0,0,0)
EndProcedure
Hope it is useful.
Alan
Posted: Wed Mar 23, 2005 1:18 pm
by DoubleDutch
Is there something i'm missing here...
What library did you open...
Anthony
Posted: Wed Mar 23, 2005 4:04 pm
by chippy73
Ooops!!
Doubledutch, I forgot to include the library to open is winmm.dll
I've edited the code above now.
Sorry about that.
Alan