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bsvplay(1) hxtools bsvplay(1) Name bsvplay -- convert BASICA music data to PCM Syntax bsvplay [-i part] [-q part] [-r rate] [file...] | aplay -f dat -c 1 Description bsvplay will convert BASICA binary music data to linear 16-bit raw PCM. Normally, you will be wanting to pipe it into a raw PCM player like aplay(1) to actually output it to a sound device. Consider lowring the sys- tem volume beforehand to avoid surprise loud output. Square waves contain odd harmonics and the total power is ~57% higher (1.95 dB). By default, bsvplay mix a square wave rendition with a sine wave rendition 1:1 to re- duce the effect of odd harmonics and reduce the power. Do note that the music data is embedded in BSV/EXE/COM files and needs to be manually located. It is usually very evident from a regular pattern in hexdumps. Options -q part Part to mix square waves in (default: 1.0) -i part Part to mix sine waves in (default: 1.0). If -q2 -i1 is specified for example, the final PCM output will consist of 2/3*squarepcm + 1/3*sinpcm. -r rate PCM sample rate (default: 48000 Hz) --pianoman Assume the input is Pianoman MUS. File format The BASICA format is defined 6-byte tuples of divisor, duration and pause. struct bsv_insn { uint16_t divisor; uint16_t duration; /* in ticks */ uint16_t af_pause; /* in ticks */ }; where divisor specifies the divisor value that it directly handed to the x86 PC speaker. The following formula holds: frequency = 1193181 / divisor; See also aplay(1), qplay(1), hxtools(7) hxtools 2008-02-06 bsvplay(1)
Name | Syntax | Description | Options | File format | See also
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