[ale] Generating sound

[Christopher Bergeron]

You can also use xmms to generate a specific frequency, if you're 
inclined to use a UI.  I think you need to install the 
xmms-input-tonegen plugin though.

Kind regards,
Chris Bergeron




Jay Goodman wrote:
> * this will create a 5 second wav file called "1k.wav"
> sox -c 1 -r 44100 -s -w -t null /dev/null 1k.wav synth 5 sine create 1000
>
> * quick and dirty mp3 conversion
> lame 1k.wav 1k.mp3
>
> * Alsa player (if alsa is used) to dump sound to speaker
> aplay 1k.wav
>
> Now, for reading in.  I have no speakers or mic at work to test, but I
> know I used to be able to do a
>
> cat /dev/dsp > input.raw
>
> to get a raw unsigned 8bit mono dump and then use sox or lame to convert
> it to a wav or mp3
>
> It's a start, play around. :)
>
>
>
>
>
>   
>> -----BEGIN PGP SIGNED MESSAGE-----
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>> Okay, admittedly I'm new to using sound cards beyond playing alert sounds
>> and
>> hooking up speakers for video/audio playback.
>>
>> I need to generate a 1kHz tone and
>>    a) emit this through a sound card to speakers
>>    and b) convert this to an MP3 file.
>> I can write a quick C program that will generate integer values in a
>> sinusoidal
>> fashion.  However, getting these values to a sound card is a mystery to me
>> at
>> this point.  Perhaps I'm thinking too low of a level - maybe the sound
>> card will
>> accept a command to generate a tone at a certain frequency.  Don't know.
>>
>> Additionally, I'll need to capture the A/D input from the line input jack.
>>  I
>> *don't* need to do both at the same time.
>>
>> If anyone could point me in a direction to get started, it'd be greatly
>> appreciated.
>>
>> Thanks,
>>     - Chuck
>>
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>>     
>
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