Olympus DM-720 Meeting and Interview Recorder - 4Gb
Perfect for recording meetings and interviews
High quality recording
The 3-microphone “TRESMIC” system available on the Olympus DM-720 delivers high quality sound recording. The recorder is also equipped with many more functions to further enhance sound recording quality.
A full array of playback functions
The DM-720 includes a variety of useful playback functions for all business situations. Functions include Voice Playback, to skip non-speech parts of your recordings, Voice Playback to ensure everyone in your recording is heard, and noise cancellation technology to remove unwanted ambient noise.
Zoom microphone for recording from a distance
With the latest directional quality control technologies, switching to directional microphone mode unleashes the power of proximity recording in noisy environments, such as at lectures or when recording from a distant position. You can adjust the directivity by operating with the "-" and "+" buttons. The new zoom microphone mode adjusts the recording level higher according to the zoom.
Usability
The recorder includes an easy-to-use interface, and convenient functions that extend your use. The Olympus DM-720 has a built-in USB connector with recharge function, expandable microSD memory (with 4Gb of on-board memory included) and voice guidance. A convenient clip stand attachment is included, to allow you to attach the recorder to a pocket or notebook.
Technical Specifications
The Olympus DM-720 is both Mac & Windows compatible, no software required this is a plug and play device.
Recording formats
Linear PCM format / MP3 format |
Sampling frequency
Linear PCM format | [48.0 kHz / 16 bit]: 48.0 kHz [44.1 kHz / 16 bit]: 44.1 kHz |
---|---|
MP3 format | [320 kbps]: 44.1 kHz [128 kbps]: 44.1 kHz [64 kbps (mono)]: 44.1 kHz [8 kbps (mono)]: 11.025 kHz |
Maximum headphone output
Recorder: ≦ 150 mV (according to EN 50332-2) |
Recording media
Built-in NAND flash memory | 4 GB |
---|---|
microSD card | Supports 2GB to 32GB |
- Some recording media memory capacity is used as a management area, so the actual usable capacity will always be slightly less than the displayed capacity.
Speaker
Built-in Ø18mm dynamic speaker |
Maximum working output: 150mW (8Ω speaker) |
Microphone Jack
Ø3.5mm, impedance 2kΩ |
Earphone Jack
Ø3.5mm, impedance 8Ω minimum |
Power source
Specified voltage | 1.5 V |
---|---|
Battery | AAA dry-cell battery x1 (LR03) or Ni-MH rechargeable battery x1 |
External power supply | USB Connecting AC Adapter (model A514; DC5V) |
External dimensions
105.9 × 39.6 × 14.4 mm
|
Weight
72g
|
Operating temperature
0 to 42°C (32 to 107.6°F) |
Frequency response
When recording from microphone jack
Linear PCM format | [48.0 kHz / 16 bit]: 20 Hz - 23 kHz [44.1 kHz / 16 bit]: 20 Hz - 21 kHz |
---|---|
MP3 format | [320 kbps]: 20 Hz - 21 kHz [128 kbps]: 20 Hz - 17 kHz [64 kbps (mono)]: 20 Hz - 13 kHz [8 kbps (mono)]: 20 Hz - 3.5 kHz |
When recording with built-in microphone
Recoding(centre microphone ON) | 20 Hz - 20 kHz |
---|---|
Recoding(centre microphone OFF) | 60 Hz - 20 kHz |
- Frequency response upper limit is set by recording mode during MP3-format recording.
During playback
20 Hz - 20 kHz |
- The upper and lower limit values of the frequency response depend on each recording format.
Battery life
When recording with built-in stereo microphone (using internal memory)
Recording mode | Alkaline dry cell battery | Nickel-metal hydride rechargeable battery | |
---|---|---|---|
Linear PCM format | 48.0 kHz / 16 bit | 26 hours (approx.) | 20 hours (approx.) |
44.1 kHz / 16 bit | 28 hours (approx.) | 21 hours (approx.) | |
MP3 format | 320 kbps | 31 hours (approx.) | 22 hours (approx.) |
128 kbps | 35 hours (approx.) | 25 hours (approx.) | |
64 kbps mono | 39 hours (approx.) | 28 hours (approx.) | |
8 kbps mono | 52 hours (approx.) | 38 hours (approx.) |
- The battery life figures shown here were determined using an Olympus test method (When [Mic Select] is set to [Central Mic Off], and [LED] is set to [Off]). Actual batterylife figures will vary greatly according to the battery used and usage conditions (Changing the playback speed or using the [Zoom Mic], [Noise Cancel] and [Voice Balancer] functions may affect the battery life).
- Battery life will be shorter when using a nickel-metal hydride rechargeable battery that has been used repeatedly.
- Battery life will be shorter when using a microSD card.
During audio file playback (all playback modes)
During speaker playbackRecording mode | Alkaline dry cell battery | Nickel-metal hydride rechargeable battery | |
---|---|---|---|
Linear PCM format | 48.0 kHz / 16 bit | 13 hours (approx.) | 11 hours (approx.) |
44.1 kHz / 16 bit | 13 hours (approx.) | 11 hours (approx.) | |
MP3 format | 320 kbps | 13 hours (approx.) | 11 hours (approx.) |
128 kbps | 13 hours (approx.) | 11 hours (approx.) | |
64 kbps mono | 13 hours (approx.) | 11 hours (approx.) | |
8 kbps mono | 13 hours (approx.) | 11 hours (approx.) |
- The battery life figures shown here were determined using an Olympus test method (When [Mic Select] is set to [Central Mic Off], and [LED] is set to [Off]). Actual batterylife figures will vary greatly according to the battery used and usage conditions (Changing the playback speed or using the [Zoom Mic], [Noise Cancel] and [Voice Balancer] functions may affect the battery life).
- Battery life will be shorter when using a nickel-metal hydride rechargeable battery that has been used repeatedly.
- Battery life will be shorter when using a microSD card.
Recording mode | Alkaline dry cell battery | Nickel-metal hydride rechargeable battery | |
---|---|---|---|
Linear PCM format | 48.0 kHz / 16 bit | 26 hours (approx.) | 20 hours (approx.) |
44.1 kHz / 16 bit | 28 hours (approx.) | 21 hours (approx.) | |
MP3 format | 320 kbps | 30 hours (approx.) | 22 hours (approx.) |
128 kbps | 30 hours (approx.) | 22 hours (approx.) | |
64 kbps mono | 31 hours (approx.) | 22 hours (approx.) | |
8 kbps mono | 35 hours (approx.) | 25 hours (approx.) |
- The battery life figures shown here were determined using an Olympus test method (When [Mic Select] is set to [Central Mic Off], and [LED] is set to [Off]). Actual batterylife figures will vary greatly according to the battery used and usage conditions (Changing the playback speed or using the [Zoom Mic], [Noise Cancel] and [Voice Balancer] functions may affect the battery life).
- Battery life will be shorter when using a nickel-metal hydride rechargeable battery that has been used repeatedly.
- Battery life will be shorter when using a microSD card.
Recording time
Linear PCM format
Recording mode | Recording mode | ||
---|---|---|---|
48.0 kHz/16 bit | 44.1 kHz/16 bit | ||
Internal memory | 4 GB | 5 hours (approx.) | 5 hours, 30 minutes (approx.) |
microSD card | 32 GB | 44 hours (approx.) | 48 hours (approx.) |
16 GB | 22 hours (approx.) | 23 hours, 30 minutes (approx.) | |
8 GB | 11 hours (approx.) | 11 hours, 30 minutes (approx.) |
MP3 format
Recording mode | Recording mode | ||||
---|---|---|---|---|---|
320 kbps | 128 kbps | 64 kbps mono | 8 kbps mono | ||
Internal memory | 4 GB | 24 hours, 30minutes (approx.) | 61 hours (approx.) | 123 hours (approx.) | 985 hours (approx.) |
microSD card | 32 GB | 212 hours (approx.) | 530 hours (approx.) | 1060 hours (approx.) | 8480 hours (approx.) |
16 GB | 105 hours (approx.) | 264 hours (approx.) | 525 hours (approx.) | 4220 hours (approx.) | |
8 GB | 52 hours (approx.) | 132 hours (approx.) | 264 hours (approx.) | 2110 hours (approx.) |
- Actually available recording times may be shorter than the figures shown here when making short recordings repeatedly (Equipment displays of available/elapsed recording times should beconsidered guideline values).
- Available recording time will also vary due to differences in the available memory capacity of different microSD cards.
Maximum recording time per file
Recording mode | Recording time | |
---|---|---|
Linear PCM format | 48.0 kHz/16 bit | 3 hours (approx.) |
44.1 kHz/16 bit | 3 hours, 20 minutes (approx.) | |
MP3 format | 320 kbps | 29 hours, 40 minutes (approx.) |
128 kbps | 74 hours, 30 minutes (approx.) | |
64 kbps mono | 149 hours (approx.) | |
8 kbps mono | 1193 hours (approx.) |
- *The maximum file size is limited to about 4GB in the MP3 format, and to about 2 GB in the linear PCM (WAV) format.
- *Regardless of the amount of remaining memory, the maximum recording time per file is restricted to the following values.
Number of music tracks (songs) that can be recorded
Internal memory (4 GB) | 900 tracks (approx.)
|
---|