Specifications

6/18/2009 6
3.2 Audio Recorder
The Compact Flash Recorder is located close to the left edge of the front panel.
Before use a formatted CF card is required. Uses a suitable CF card adapter connected to a PC
(or Mac) and format the card according to the FAT32 standard. Any other formats will be
useless in MM-4220.
Suitable CF cards have a capacity between 2 GB and up. High-speed cards are preferred.
For 24 bits recordings this is required. Some example CF cards that usually work with this mixer
are KINGSTON 133x and 266x and SANDISK Ultra III.
Do not put any other files onto the card, only files generated by MM-4220 should be on it.
The card fits into the front panel slot, facing left.
When a CF card is inserted and found to be correct the MODE LED will be violet, Otherwise it
will be blue.
There are five keys for controlling the recorder:
>> >> is used for skipping forward between recordings and within recordings.
This key is valid only while in playback mode.
A brief press will skip to next file (unless file played is the last recorded).
Press-hold will skip forward within the file.
<< << is used for skipping backwards between recordings and within recordings.
This key is valid only while in playback mode.
A brief press will skip to previous file (unless file played is the first recorded).
Press-hold will skip backwards within the file.
This is the STOP key. It will end a recording and save the file with a new file
number. In playback mode it will halt playback and return the mixer outputs to
mixer mode.
This is the RECORD key. Pressing it will immediately start a new recording.
The MODE LED will turn red.
This is the PLAYBACK key. The last file recorded will play back when this key is
pressed. The MODE LED will turn green.
Pressing it again will enter PAUSE mode and the MODE LED will flash.
Files are recorded in uncompressed standard Wav-format with 48 kHz sample rate and 16 or
24 bits resolution. The files are automatically numbered REC00000.wav and up. Each file will
get a correct time stamp, provided the real-time clock has been set correctly.
Maximum length for a single file is 2 hours.
Files recorded may be played back in any PC or Mac directly from the CF card, with a suitable
CF card reader.
3.2.1 16 / 24 bits mode selection
For selecting 24 bits recording mode, hold the >> >> key while powering on the mixer.
The bar graph will show 3 + 3 LEDs lit.
For selecting 16 bits recording mode, hold the << << key while powering on the mixer.
The bar graph will show 2 + 2 LEDs lit.