Hi All

I would like to use CSound to analyze ambient sound. So I tried to set up a microphone

and use following opcode: spectrum, specdiff, etc. to achieve my goal. However, I am

stuck at the first step when I tried to make a microphone to work. In my orc file, I have

some code piece like

 

instr     1
asig     in                       ; GET MICROPHONE INPUT

wsig1   spectrum  asig, .01, 8, 12, 8, 0, 1, 0

wsig2   specdiff  wsig1

           specdisp  wsig2,  1

out asig
endin

It doesn't work at all. So I changed the "GET MICROPHONE INPUT" line to

 

asig     soundin "123.wav"    ;USE A WAVE FILE AS INPUT

 

and it works fine for those spec???? opcode.

 

Anything I need to pay attention to when I want to use a microphone? Such as

and command line flag?

 

I am using CSound_AV on Windows XP. When I tried to use -+I or -i command flag,

it will return error like

 

; error message for -+P0 -+I0

Portaudio OUTPUT device num.0 selected:
---->Microsoft Sound Mapper - Input
Portaudio INPUT device num.0 selected:
------>Microsoft Sound Mapper - Input
An error occured while using the portaudio stream.Error number: -9998
Portaudio error message: Invalid number of channels
writing 20-byte blks of shorts to portaudio

 

SECTION 1:
An error occured while using the portaudio stream.Error number: -10000
Portaudio error message: PortAudio not initialized

The CSound_AV will crash directly when I use "-+P0 -idevaudio0" flag.

Thanks a lot for your help.

Chaochi