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Olympus Imaging America Inc. Page 9 of 14 Last updated on September 24, 2009
Using removable memory media can expand the recording capacity of the DM-420. The
table below shows the potential recording capacity of the recorder with different sized
microSD and microSDHC memory cards.
Recording Mode Maximum Dictation Recording Time (memory card)
1 GB 2 GB 4 GB
MP3 320 kbps 6 hrs. 30 min. 13 hrs. 30 min. 27 hrs. 00 min.
MP3 256 kbps 8 hrs. 00 min. 17 hrs. 00 min. 34 hrs. 00 min.
MP3 192 kbps 11 hrs. 00 min. 23 hrs. 00 min. 45 hrs. 00 min.
MP3 128 kbps 16 hrs. 30 min. 34 hrs. 00 min. 68 hrs. 00 min.
ST XQ 16 hrs. 00 min. 33 hrs. 00 min. 66 hrs. 00 min.
ST HQ 32 hrs. 00 min. 67 hrs. 00 min. 133 hrs. 00 min.
ST SP 65 hrs. 00 min. 135 hrs. 00 min. 266 hrs. 00 min.
HQ 65 hrs. 00 min. 135 hrs. 00 min. 266 hrs. 00 min.
SP 128 hrs. 00 min. 267 hrs. 00 min. 524 hrs. 00 min.
LP 255 hrs. 00 min. 531 hrs. 00 min. 1042 hrs. 00 min.
Which recording quality mode should I use?
Different quality modes save the digital record of a signal with different levels of faithfulness
to the original sound. The ST XQ and ST HQ modes are recommended for music, drama or
interviews that may be made for broadcast because they make very detailed digital records
of the sound and use a very wide frequency range.
Lower-quality modes, such as SP (Standard Pl
ay) and LP (Long Play), make a less-
detailed digital record of the signal and use a narrower frequency range so they will use
up the available Flash memory much more slowly. These modes are best used for audio
note taking or for recording college lectures or seminars – situations in which large
content capacity is more important than high audio quality.
What are the maximum recording times per file?
A maximum recording time per file is set for each quality mode. Even if a recorder’s
memory i
s not ex
hausted, a single recording cannot be continued beyond the limit.
Maximum Recording Time Per File
Quality Mode Recording Time
MP3 320 kbps mode 29 hours, 40 minutes
MP3 256 kbps mode 37 hours, 10 minutes
MP3 192 kbps mode 49 hours, 40 minutes
MP3 128 kbps mode 74 hours, 30 minutes
ST XQ mode 26 hours, 40 minutes
ST HQ mode 26 hours, 40 minutes
ST SP mode 53 hours, 40 minutes
HQ mode 26 hours, 40 minutes
SP mode 53 hours, 40 minutes
LP mode 148 hours, 40 minutes