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
       system  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 reduce 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)