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Olympus Imaging America Inc. 

Page 6 of 14 

Last updated on September 24, 2009 

What is EUPHONY?  

The DM-420 features EUPHONY MOBILE – a psychoacoustic surround sound system that 
combines bandwidth correction, expansion technology and virtual acoustical source 
processing technology to allow the listener to alter the audio dynamics when playing back 
recordings through earphones. EUPHONY creates a natural, expansive feel so listeners are 
less prone to experience a closed-in feeling or to grow tired over extended listening sessions, 
such as when playing audio books. The options are: 

OFF

,

 Natural

,

 Wide 

and 

Power

EUPHONY is only applied during playback and cannot be used when recording. 

What is VCVA? 

Variable Control Voice Actuator (VCVA) is a function that configures the recorder to 
record automatically only when sound is detected at a pre-set level, and stop when the 
sound drops below the threshold level. The purpose of the function is to eliminate “dead 
air” during recordings, thereby conserving memory and shortening file times. 
VCVA is enabled in the recorder’s menu.  In the DM-420, the VCVA can be set to any of 
15 different values.  The higher the value, the more sensitive the recorder is to sounds. 
At the highest level, even the faintest sound will activate recording. 

What is the function of the LowCut Filter? 

The recorder has a 

Low Cut Filter

 function to minimize low-frequency sounds and 

record voices more clearly. This function can reduce noise from air conditioners, 
projectors and other types of “white noise.” 

What is the function of the Voice Filter? 

The 

Voice Filter

 cuts low- and high-frequency tones to create a playback frequency 

range encompassing the tones in the human voice, thereby making the playback of 
dictation recordings clearer. Voice Filter works in all playback speeds. 

What enhancements do the upgrades to Olympus Sonority offer? 

Purchasing the upgrades adds the following features to the version of Olympus Sonority 
that is bundled with the DM-420: 

Plus Edition 

 

MP3 Editing

 – Adds the ability to output and convert to an MP3 file. With the 

MP3 format, output and conversion at 320 kbps, 256 kbps, 192 kbps and 128 
kbps as well as ID3 tag editing are possible.

 

 

Create a Music CD 

– Allows an audio CD to be easily created by specifying in the 

browsing screen the files to write to a CD. If the total size of the specified audio 
files exceeds the capacity of a CD, the files can be divided onto multiple CDs. 

 

 

Configuring the Recorder Menu 

– The built-in device settings (advanced 

settings such as the recording mode, alarm setting and timer recording) can be 
configured using Olympus Sonority.

 

Music Editing Plug-in 

 

Effects 

– Over 20 types of advanced effect functions.

 

 

Spectrum Analyzer 

– Displays in real time the frequency distribution of a sound 

being played in the Waveform Editing screen. 

 

 

Unlimited Track Editing 

– Eliminates the limitation on the number of tracks 

that can be edited simultaneously.

 

To add the Music Editing Plug-in, Olympus Sonority must first be upgraded to the Plus Edition.  

Summary of Contents for DM-420 - Digital Voice Recorder Combo

Page 1: ... ROM Olympus Sonority software Instruction manual Warranty card Two AAA NiMH rechargeable batteries Features and Benefits Model DM 420 Recording Format MP3 MPEG 1 Audio Layer 3 WMA Windows Media Audio Recording Media 2 GB built in Flash memory microSD card slot Recording Time1 MP3 320 kbps mode 13 hours 45 minutes 256 kbps mode 17 hours 15 minutes 192 kbps mode 23 hours 00 minutes 128 kbps mode 34...

Page 2: ...192 kbps mode 44 1 kHz 192 kbps 128 kbps mode 44 1 kHz 128 kbps WMA ST XQ mode 44 1 kHz 128 kbps ST HQ mode 44 1 kHz 64 kbps ST SP mode 22 kHz 32 kbps HQ mode 44 1 kHz 32 kbps SP mode 22 kHz 16 kbps LP mode 8 kHz 8 kbps Overall Frequency Response MP3 320 kbps mode 40 20 000 Hz 256 kbps mode 40 20 000 Hz 192 kbps mode 40 19 000 Hz 128 kbps mode 40 17 000 Hz WMA ST XQ 40 19 000 Hz ST HQ 40 15 000 Hz...

Page 3: ...tely Battery Life Alkaline Recording MP3 128 kbps mode Approx 37 hours WMA ST XQ mode Approx 38 hours LP mode Approx 51 hours Playback Speaker MP3 128 kbps mode Approx 19 hours WMA ST XQ LP mode Approx 19 hours Earphone MP3 128 kbps mode Approx 57 hours WMA ST XQ LP mode Approx 58 hours NiMH BR 401 Recording MP3 128 kbps mode Approx 30 hours WMA ST XQ mode Approx 30 hours LP mode Approx 41 hours P...

Page 4: ...ray of preferred settings via a single menu selection Three of the Recording scenes are pre set with optimal settings for specific recording conditions another three can be customized by the user Five Playback scenes are available There are five folders for organizing recordings and separate folders for storing Podcasts Music files and audio content purchased from Audible com The Music folder hold...

Page 5: ...ide Zoom Low Cut Filter Off On On On VCVA Off Off Off Off Standby On On On On What are Playback Scenes The DM 420 has an option for the user to create up to five Playback Scenes to setup the recorder to preset playback scenarios The settings that can be saved as a Playback Scene are Property Noise Cancel EUPHONY Voice Filter Play Mode Play Speed Skip Space Backlight and LED To create a Playback Sc...

Page 6: ...The recorder has a Low Cut Filter function to minimize low frequency sounds and record voices more clearly This function can reduce noise from air conditioners projectors and other types of white noise What is the function of the Voice Filter The Voice Filter cuts low and high frequency tones to create a playback frequency range encompassing the tones in the human voice thereby making the playback...

Page 7: ... What is the purpose of the Audible folder The Audible folder a subfolder of the Music folder is present to receive and play audio content purchased from the Audible com Web site http www audible com Audible com is a source for audio books and audio newspaper and magazine articles Audible also has Web sites for the United Kingdom France and Germany for content in other languages Audible files are ...

Page 8: ...on recording time available in the DM 420 depends on several factors including the selected quality mode and whether the recorder is configured to use internal memory or a removable memory card sold separately When a quality mode is selected several audio file properties are put into place These properties determine the level of detail of the saved file data A higher quality recording saves more d...

Page 9: ...lity 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 re...

Page 10: ...so advised One advantage of recording to removable media is that multiple cards can be used to organize content e g one can hold podcasts and another can hold a music library How is recording volume controlled By default the DM 420 records automatically at 100 volume level to prevent accidentally recording with the volume set too low The recorder has three levels of microphone sensitivity High The...

Page 11: ...d Press the button to select Start and then press the OK button The LCD will then display Erase Done To erase all of the files in a folder use the same procedure but select Erase in Folder instead of File Erase Note Locked files and files that are set as read only cannot be erased using this function I want to clear my recorder of all loaded files How do I format the recorder The recorder should b...

Page 12: ... from the USB port without using the recommended disconnect procedure can result in corruption of files or firmware Double clicking on the Safely Remove Hardware icon opens a dialog box to shut down the USB connection so that the device can be safely disconnected Select the device to be disconnected by clicking once on its name and then click on the Stop button Clicking on the Stop button launches...

Page 13: ...z 19 000 Hz ST HQ mode 40 Hz 16 000 Hz ST SP mode 40 Hz 9 000 Hz HQ mode 40 Hz 13 000 Hz SP mode 40 Hz 8 000 Hz LP mode 40 Hz 3 000 Hz Is there an AC adapter available for the DM 420 The DM 420 is compatible with the optional A 514 AC Adapter The adapter can be used to power the recorder and also to charge the rechargeable batteries bundled with it The A514 AC Adapter can be purchased directly fro...

Page 14: ...ter and open Olympus Sonority Select the Device Upload Voice Guidance Files menu option The Transfer Voice Guidance Files dialog box will appear Voice Guidance files that can be uploaded are listed in the drop down list Select the desired Voice Guidance language to upload and click on the OK button The Voice Guidance in the selected language will upload to the recorder The Voice Guidance file set ...

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