Roland SD-50 - Manual (Page 62)

62
Using the SD-50 as an SMF/Audio Player
What is SMF?
SMF (Standard MIDI File) is a data format that was created in order to standardize music data across
manufacturers. Many collections of SMF music data are available in a wide range of musical styles for listening
enjoyment, instrument practice, or karaoke.
SMF/audio files that can be played
* You can’t use SMF/audio file playback employing USB memory while the SD-50 is connected to a computer.
* Some utility functions (p. 74) cannot be executed while the player is playing back a song.
SMF
MID
Format
0 or 1
* SMF format 1 limits the tracks that can be played back.
File size
Maximum of approximately 240 KB
(differs slightly depending on the content of the SMF)
System exclusive Packet size of 512 bytes or less
Audio files
WAV/AIFF
Sampling frequency 44.1 kHz
Bit depth 8/16/24 bits
MP3
Format MPEG-1 audio layer 3
Sampling frequency 44.1 kHz
Bit rate
32/40/48/56/64/80/96/112/128/160/192/224/256/320 kbps,
VBR (Variable Bit Rate)
SD-50_e.book 62 ページ ２０１０年１月２５日 月曜日 午前１０時５２分