Edit and Playback Functions
Overview: The Olympus DM-901 is a compact, hand-held portable digital voice recorder
with features found in professional dictation systems. The
recorder records onto a built-in 4 GB flash memory, or optional SD memory cards for
hours of recording time. It has built-in Wi-Fi, so you can remotely control it
with a smartphone. The recorder has a built-in microphone, a 20mm diameter mono speaker, and
jacks for an external microphone and headphones. The DM-901 operates on an
LI-50B rechargeable Lithium-Ion battery (included).
Color LCD Display: The DM-901 features a 2" (diagonal)
backlit, full color LCD display which indicates recording and playback information. The recorder
will display the elapsed or remaining recording time in hours, minutes, and
seconds. When not recording, the current time can be displayed. You can set the
brightness to one of three levels, and the backlight duration to 5, 10, 30, or
seconds, or always on.
Date and Time: The recorder features a built-in clock. If
you have set the time and date, information as to when a sound file was recorded
is stored automatically with that file.
Ear Bud Headphones: The DM-901 comes with a pair of ear bud
headphones with three sizes of ear tips.
Built-in Microphone: The unit features a built-in stereo
microphone on the top of the recorder. You can set the recording level to
High, Middle, or Low presets, or set it manually to any of 30 levels. In addition to the built-in microphones, the
recorder also has a 3.5mm external microphone input.
Zoom Microphone Function: The Zoom Mic function lets you
increase the directivity of the pickup range while at the same time narrow the
width of the range. The Zoom Mic range can be varied from its widest point (-3)
to its narrowest point (+6).
Memory Card Slot: The DM-901 has a 4 GB built-in memory,
and a slot for SD memory cards. The slot
will accept SD, SDHC, and SDXC memory cards from 512 MB to 64 GB.
USB Port: The DM-901 has a Mini-B 2.0 USB port on the side to let you connect the unit to your computer for transferring
files or charging the battery. The unit is Hi-speed USB
2.0-compatible, and can work with the following Operating Systems: Windows 8, Windows 7, Windows Vista, Windows XP,
and Mac OS X (v10.5-v10.9).
Power Requirements: The recorder is powered by an LI-50
Lithium-Ion rechargeable battery. The batteries charge via the included AC
adapter and USB cable in approximately 3
hours. It can also be charged by connecting to a PC's USB connector. A fully-charged battery provides approximately
29 hours of battery life when recording (Rec Monitor off) and up to 29 hours in
playback mode (with earphones).
Power Save: The Power Save function switches the unit to
Standby after a preset amount of time without a button being pressed. You can
set the Power Save duration to 5 minutes, 10 minutes, 30 minutes, 1 hour, 2
hours, 3 hours, or
Recording Format: The DM-901 records audio files in Linear
PCM, MP3, and WMA formats. Recording time for each format is as follows:
|Maximum Recording Time
|LPCM 48kHz/16 bits
|LPCM 44.1kHz/16 bits
|MP3 256 kbps
|MP3 128 kbps
|WMA 32 kbps
|WMA 8 kbps
File Structure: The DM-901 features separate folders for
voice recordings, music playback, and podcast playback. There are 5 folders for
voice recordings, and each folder can store up to 999 files. When music files
are created using Windows Media Player and transferred to the recorder, folders
are created in two levels (artist and album). Each folder can store up to 999
files, and up to 6000 songs can be saved in the music folder. Podcast files
transferred from Olympus Sonority software to the recorder are placed in program
folders. Each folder can store up to 999 files, or up to a total of 6000 files.
Recording Scenes: A recording setting can be set to one of
five templates to suit the recording scene or situation, or you can register a
specific setting and save it for later use. The available Recording Scenes
- Lecture: suitable for recording lectures and large
- Conference: Suitable for seminars with a small number
- Meeting: Suitable for recording meeting
- Dictation: Suitable for dictation
- DNS: Suitable for voice recognition software (see more
DNS Scene: The DNS recording scene lets you record spoken
audio that you will later transcribe. DNS makes the audio suitable to use with
optional Dragon NaturallySpeaking software, which uses speech-to-text technology
to transcribe spoken words into a text document. When set to DNS, the total
recording time is 55 hours using the built-in 4 GB memory.
Edit and Playback Functions
Playback Speed: You can adjust the playback speed as you
desire; slowing it down to review spots you couldn't understand, or speeding it
up to listen to meeting content at a faster speed. When you press the Speed
button, you can vary the playback speed without changing the pitch. The playback
speed can be slowed down from 100% (normal) to 50% (slow) in increments of 10%.
It can be increased in increments of 10% (from 100% to 200%), 20% (from 200% to
400%), or 50% (from 400% to 600%).
ABC Repeat Playback: The recorder lets you repeat the
playback of a portion of the file being played. In addition to the A-B repeat
function, the segment to repeat can be changed during repeat playback. When the
starting point (A) is canceled, the ending point (B) becomes the new starting
point and a new ending point (C) can be selected. You can repeatedly specify a
new segment to be played back up to the end of the file.
Index/Temp Marks: Setting an index mark
lets you quickly find a location you want to listen to while fast forwarding or
fast rewinding. Up to 99 index marks can be placed on a single file. Temporary
(temp) marks are similar to index marks, but are automatically erased when you
select a different file, transfer the file to a PC, or move the file on a PC.
Erase: You can erase your recorded
messages one by one, erase all messages in the current folder at once, or erase
a selected folder. PCM format files can be partially erased to eliminate
unneeded parts of the file.
Hold Function: The DM-901 has a Hold function that will
lock the buttons to prevent accidental operations. The Hold function is
activated by sliding the power switch to the right.
Schedule Screen: The recorder has a voice memo function that
allows you to record a one-minute voice memo on a specified date and time.
Because the voice memo is played at a specific day and time, it can be used to
help manage your schedule. Up to 99 voice memos can be recorded in a day, and a
total of up to 1000 voice memos can be registered to the recorder.
Alarm Function: The Alarm function can be used to play back
a registered voice memo at a specified date and time. You can enter a time and
date for the memo to be played. When the set time arrives, the alarm sounds for
up to five minutes. During that five minutes, you can play the voice memo by
pressing the play button.
Olympus Sonority Software: The included Olympus Sonority software helps
you manage your files on your computer. It must first be installed on your
computer before connecting the recorder. With the software, you can edit files,
apply special effects, combine or divide files, send files by email, change
folder names, and save a file in a different format. The software is compatible with the following Operating
- Windows: XP (SP2/SP3), Vista (SP1/SP2), 7, 8
- Mac: OS X 10.5 to 10.9
Built-in Wi-Fi: The DM-901 has built-in Wi-Fi. With the Olympus Audio
Controller application for smartphones, you can operate the voice recorder from
a distance. The application is compatible with Android devices running Android
2.3.3. and up, and is available from Google Play. It is also compatible with
Apple iPhone, iPad, and iPod touch running iOS 5.0 or later.
Functionality: When connected via Wi-Fi, you can perform the
- Set Up: You can easily set up the Wi-Fi connection between the
recorder and your smartphone by scanning the QR Code displayed on the
recorder using your smartphone's camera.
- Record: You can start and stop recording using your smartphone.
Regardless of the recorder's settings, remote recordings via the Olympus
Audio Controller app will be made as MP3 format at 128 kbps.
- Link Images to Voice Files: You can attach images taken on your
smartphone to recorded audio files.
- Add Index Marks: You can add index marks to recordings to help
you easily locate specific parts of the recording.
- Share Recordings: Recorded files can be uploaded to Dropbox,
where you can play or edit the recording, or share them with friends.