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Operating Systems OS X (Apple) AC to DC trigger pulse for AudioScope.sh. Post 302897427 by wisecracker on Monday 14th of April 2014 05:47:42 AM
Old 04-14-2014
That part is the 44 byte header to make the waveform a ".WAV" file, otherwise it would be a ".RAW" file instead.

There is/are reams of info on the ".WAV" format and it is dead easy to create all sorts of waveforms, (within limits of course), and generate differing headers for the differing ".WAV" formats; e.g. 16 bit, stereo, various sample rates, ect, etc...

Hope this helps...
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load_sample(3alleg4)						  Allegro manual					      load_sample(3alleg4)

NAME
load_sample - Loads a sample from a file. Allegro game programming library. SYNOPSIS
#include <allegro.h> SAMPLE *load_sample(const char *filename); DESCRIPTION
Loads a sample from a file, supporting both mono and stereo WAV and mono VOC files, in 8 or 16-bit formats, as well as formats handled by functions registered using register_sample_file_type(). Example: SAMPLE *sample = load_sample(user_input); if (!sample) abort_on_error("Couldn't load sample!"); RETURN VALUE
Returns a pointer to the SAMPLE or NULL on error. Remember to free this sample later to avoid memory leaks. SEE ALSO
destroy_sample(3alleg4), load_voc(3alleg4), load_wav(3alleg4), play_sample(3alleg4), save_sample(3alleg4), register_sam- ple_file_type(3alleg4), exsample(3alleg4) Allegro version 4.4.2 load_sample(3alleg4)
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