Sound Functions

Sound

 

bm924         number of bits per sample (8 or 16)

 

The number of bits per sample element returns the number of bits per sample for a sound entered as a parameter. For the PCM sound format a value of 8 or 16, for the Microsoft ADPCM a value of 4, for other formats mostly 0 will be returned.

 

bm925         sample frequency (Hz)

 

The sample frequency element returns the sample frequency for a sound entered as a parameter. For the PCM sound format value of 11025, 22050 or 44100 will be returned.

 

bm926         is sound stereophonic?

 

The is sound stereophonic? element returns a logic flag for a sound entered as a parameter, indicating, whether the sound is stereophonic (2 channels) or monophonic (1 channel).

 

bm927         length of sound (seconds)

 

The length of sound element returns the sound length in seconds for a sound entered as a parameter.

 

bm928         convert to 8 bits

 

The convert to 8 bits element converts a sound entered as an input parameter to an 8 bits per sample format and presents it as a new sound on the output. PCM format sounds only can be converted; other formats will be converted to PCM automatically.

 

bm929         convert to 16 bits

 

The convert to 16 bits element converts a sound entered as an input parameter to a 16 bits per sample format and presents it as a new sound on the output. PCM format sounds only can be converted; other formats will be converted to PCM automatically.

 

bm930         convert to stereo

 

The convert to stereo element converts a sound entered as an input parameter to a stereophonic format (2 channels) and presents it as a new sound on the output. PCM format sounds only can be converted; other formats will be converted to PCM automatically.

 

bm931         convert to mono

 

The convert to mono element converts a sound entered as an input parameter to a monophonic format (1 channel) and presents it as a new sound on the output. PCM format sounds only can be converted; other formats will be converted to PCM automatically.

 

bm932         convert to 11 kHz

 

The convert to 11 kHz element converts a sound entered as an input parameter to the sample frequency of 11025 Hz and presents it as a new sound on the output. PCM format sounds only can be converted; other formats will be converted to PCM automatically.

 

bm933         convert to 22 kHz

 

The convert to 22 kHz element converts a sound entered as an input parameter to the sample frequency of 22050 Hz and presents it as a new sound on the output. PCM format sounds only can be converted; other formats will be converted to PCM automatically.

 

bm934         convert to 44 kHz

 

The convert to 44 kHz element converts a sound entered as an input parameter to the sample frequency of 44100 Hz and presents it as a new sound on the output. PCM format sounds only can be converted; other formats will be converted to PCM automatically.

 

bm935         sound decompression

 

The sound decompression element converts a compressed format (as ADPCM or MP3) sound to the PCM format, which can be played mixed with other sounds or can be converted. If necessary, the conversion functions will decompress the sound automatically. Only those formats can be decompressed for which a decoder (codec) is installed in the Windows system. These are all formats that can be played in the Windows system.

 

bm936 change speed of sound

  bm937 sound to conversion

  bm938 relative change of speed (1=unchanging)

 

The change speed of sound element converts the playback speed of a sound entered on the input, and presents it as a new sound on the output. The coefficient of the relative change of speed can have negative value as well, in this case the sound is played in the reverse direction. The value of 1 meaning no speed change. PCM format sounds only can be converted; other formats will be converted to PCM automatically.

 

bm939 tone generator

  bm940 frequency of tone (1 to 11025 Hz)

  bm941 length of tone (seconds)

 

The tone generator element creates a sine wave tone having an entered frequency and an entered length, and presents it as a new sound on the output. The output sound has a PCM format, 16 bits per sample, 22050 Hz, mono. The admissible frequency range is 1 Hz till 11025 Hz. The tone length is corrected to generate an integral number of tone waves, thus enabling a smooth link-up of different tones (without formation of disturbing beats).