mciSendString

[JurkMonkey]

Hey,

I have an audio device which I'm trying to set the bitrate on. So I've been using the following command:

sCommand = "set " + m_DeviceAlias + " time format ms tempo 60 bitspersample 8 channels " + sampleChannels + " samplespersec " + sampleRate + " format tag pcm";

			rc = mciSendString(sCommand, null, 0, IntPtr.Zero);

my sampleChannels = 2 (Stereo) and my sampleRate = 44100. I want to drop it down to 22050 but it gives me an error.

MCI errmsg: The driver cannot recognize the specified command parameter.

Any ideas?

 

[JurkMonkey]

Ok. Turns out, Tempo can't be used on .wav files. Tempo is supposed to be used on MIDI.

Now my problem is this: my counter goes waaaaay too fast. I need to drop the counter speed down.

 

[JurkMonkey]

Finally figured out the timer thing.

You have to set bytespersec and use the following formula:

(samplesPerSecond * bitsPerSecond * (channels / 2)) / 8

(44100 * 16 * (1/2)) / 8 CD Quality Mono
(22050 * 16 * (2/2)) / 8 Radio Quality Stereo
(11025 * 8 * (2/2)) / 8 Telephone Quality Stereo

In case anyone else runs into this problem.