Float To PCM Conversion

[freydman]

I am getting a wave signal data in my program as the float array data (not from sound card!). How can I play this signal as a sound sample through the standard PC sound card?
Who knows the conversion algorithm of the float data to the PCM WAV-data?
Preferably in Java.

[steve]

PCM data is simply a series of "sample values", where a "sample value" is the instantaneous amplitude at a point in time.
The sample values are at regular intervals according to the "sampling rate" (or "sample rate"). For example, if the sample rate is 44100 Hz, then the sample values represent the instantaneous amplitudes measured at intervals of 1/44100th second (0.000022676 seconds).

For 32-bit float PCM, sample values of +/- 1.0 equates to 0 dB.

To play 32-bit float data from an array, you need to send the data as a stream to the sound system via a "mixer object". See the Java sound API for more information: http://docs.oracle.com/javase/7/docs/te ... tents.html

[steve]

See also: https://docs.oracle.com/javase/7/docs/a ... ystem.html