Olympus DM-420 User Manual page 9

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
MP3 320 kbps
MP3 256 kbps
MP3 192 kbps
MP3 128 kbps
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 Play) 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 is not exhausted, a single recording cannot be continued beyond the limit.
Olympus Imaging America Inc.
Maximum Dictation Recording Time (memory card)
6 hrs. 30 min.
8 hrs. 00 min.
11 hrs. 00 min.
16 hrs. 30 min.
ST XQ 16 hrs. 00 min.
ST HQ 32 hrs. 00 min.
ST SP 65 hrs. 00 min.
HQ 65 hrs. 00 min.
SP 128 hrs. 00 min.
LP 255 hrs. 00 min.
Maximum Recording Time Per File
Quality Mode
MP3 320 kbps mode
MP3 256 kbps mode
MP3 192 kbps mode
MP3 128 kbps mode
ST XQ mode
ST HQ mode
ST SP mode
HQ mode
SP mode
LP mode
1 GB 2 GB
13 hrs. 30 min.
17 hrs. 00 min.
23 hrs. 00 min.
34 hrs. 00 min.
33 hrs. 00 min.
67 hrs. 00 min.
135 hrs. 00 min.
135 hrs. 00 min.
267 hrs. 00 min.
531 hrs. 00 min.
Recording Time
29 hours, 40 minutes
37 hours, 10 minutes
49 hours, 40 minutes
74 hours, 30 minutes
26 hours, 40 minutes
26 hours, 40 minutes
53 hours, 40 minutes
26 hours, 40 minutes
53 hours, 40 minutes
148 hours, 40 minutes
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4 GB
27 hrs. 00 min.
34 hrs. 00 min.
45 hrs. 00 min.
68 hrs. 00 min.
66 hrs. 00 min.
133 hrs. 00 min.
266 hrs. 00 min.
266 hrs. 00 min.
524 hrs. 00 min.
1042 hrs. 00 min.
Last updated on September 24, 2009