How do the digital voice recorders work?

Answered By: Jessica Wykes
Last Updated: 13 Oct 2022 Views: 15

Olympus DM-770 Digital Voice Recorder instructions for use

Olympus DM 770 Digital Voice Recorders are available to borrow from the Library Help Desk at Northampton square and Law (on referral from Disability or Neurodiversity Support).

The DM-770 can be used to record lectures, seminars, meetings and your own dictation. You can upload MP3 recordings to a computer and transcribe using Dragon Professional where available.

Digital Voice recorder device showing features listed below.

Find the following features available in the Digital Voice Recorder:

  1. Microphones at the top of the device
  2. Slider to switch the power on on the left side of the device
  3. Slider to open the usb connector on the same side below the power slider
  4. The usb connector at the bottom of the device
  5. Jack-in to connect an additional microphone and headphones.


Turn on and off

  • To switch on: On the left-hand side of the recorder, slide the power/hold switch downwards in the direction of the arrow to turn on the device.
  • So switch off: slide the power/hold switch in the direction of the arrow for at least half a second.

Battery charging

The recorder has an average battery life of 52 hours.

  1. Charge the device using the cable or by inserting the device’s USB into a USB port. 
  2. Press OK to start charging.

Voice guide

Use voice guide to navigate the device. It will tell you out loud each button you select.

  1. Press Menu.
  2. Use + and Fast Forward to select Voice Guide then press OK.
  3. Press OK to select On/Off.
  4. Use + and - to choose ‘Off’ or ‘On’.
  5. To save the voice guide setting press OK.

Setting the date and time

  1. Press Menu.
  2. Use + and Fast Forward to select the Time & Date then press OK to select.
  3. Use +Fast Forward and Rewind to change the date and time.
  4. To save the date and time press OK.

Microphone settings

The device can be set to the appropriate recording environment to achieve the best sound quality.

Setting the recording scene
  1. Press Menu.
  2. Use + and Fast Forward to navigate to select Rec scene then press OK.
  3. Use + and - to scroll through the different environments, e.g Lecture, meetings, conferences, or dictation.
  4. Press OK to select an environment.

The AUTO setting is recommended, as this will adjust the recording quality automatically.

Noise cancelation

This feature enables you to filter out background noise when recording.

  1. Press Menu.
  2. Use + and Fast Forward to select Noise Cancel.
  3. Press OK to select.
  4. Select High or Low using the - button.
  5. Press OK to save the setting.

Making recordings

Save your recordings in folders so that you can easily find and save them.

  1. From the recording screen, press F1 (Folder) until the required folder is displayed at the top of the screen. E.g. ‘A’.
  2. Press Record to start recording.
  3. To pause a recording, press Record.

The pause function enables you to pause the recording when there is an interruption or something which you do not need to record.

  1. To continue a recording, press Record again.
  2. To stop your recording, press Stop.

Index marks

Index marks are like bookmarks you can insert into your recording to make it navigable. For example, you could insert an index mark each time the presenter changes a PowerPoint slide so you will not have to listen to the whole recording again to find the specific part you need.

  1. To add an index mark during a recording, press the F2 (INDEX) button.
  2. Repeat this process as required.

Playing back recordings

  1. To quickly preview a recording, press OK/Play.
  2. To stop audio playback, press Stop.

Reviewing recordings

Each recording is automatically saved with a file number. For example, your first recording in Folder A will be saved as 01/01.

  1. To a select a saved recording, press F1/Folder in the recording screen.
  2. The current selected folder will be displayed at the top of the screen.
  3. Press Fast Forward or Rewind to scroll through the recordings until you reach your required recording. The number of the recording will be displayed at the top of the screen. E.g. A 01/01.
  4. To listen to your selected recording, press OK/Play.
  5. To pause, press Stop.
  6. To continue, press Play.
Using index marks in saved recordings
  1. During playback, press Fast Forward to navigate to an index mark.
  2. To navigate back to a previous index mark, press Rewind.

You can add new index marks to saved recordings during playback.

  1. To add an index mark, simply press F2/INDEX as required.

Changing the playback volume and speed

  1. To increase/decrease the playback volume press + or -.
  2. To slow down the playback speed press Play.
  3. To increase the playback speed, press Play again.
  4. To return the playback speed to normal, press Play again.
  5. To stop playback, press Stop.

Deleting recordings

  1. From the Recording screen, press F1/FOLDER until the folder you require is displayed at the top of the screen.
  2. Press Fast Forward or Rewind until you reach your required recording. Recordings are filed as numbers. E.g 01/02.
  3. To delete the selected recording, press Erase.
  4. From the Erase menu, press + to highlight One File and press OK.
  5. Press + to highlight Start and then press OK to delete the recording.

Saving recordings to a computer

  1. Connect the DM 770 to a computer using the USB cable.
  2. Locate and open the device folder.
  3. Save and name the recording in a folder of your choice.

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