28 TASCAM DR-100MKIII4 – Recording3. Select the FORMAT item and set the dual recording MP3format.Options: MP3 320 kbps (default), MP3 256 kbps, MP3 192kbps, MP3 128 kbps4. Press the REC [0] button to enter recording standby.On the Home Screen, FORMAT will appear next to DUAL in therecording function information area.Names of backup files when using dualrecordingA backup file created by dual recording has "_D" added to its filename.A backup file created by dual format recording has "_D" addedto its file name, and change to “.mp3”extension.TASCAM_0002.WAVTASCAM_0002_D.WAVTASCAM_0002_D.mp31 Recording file number2 "D" indicates dual recording3 ".mp3" dual format recording backup file extensionUsing the auto tone functionThe auto tone function can be used to automatically insert atone signal (1kHz sine wave) whenever recording starts andstops.By connecting the LINE OUT jack to the audio input jack of aDSLR camera, both units can record the same tone signals totheir files. These tones can be used as guides to synchronize thefiles in video editing software.For details about how to connect the unit with a DSLR camera,see “Connecting cameras” on page 19.1. Select the REC SETTING screen AUTO TONE item to open theAUTO TONE screen. (See “Basic menu operation procedures”on page 10.)2. Select the MODE item and set where tone signals are inserted.Options: OFF (default), HEAD (recording start only),HEAD+TAIL (recording start and stop)3. Select the LEVEL item and set the tone volume.Options: -12 dB, -18 dB(default), -24 dB, -30 dB, -36 dBNOTE• Tone signals are not output to headphones.• Even if you select HEAD+TAIL, no tone signal will be added atthe end when recording is paused.Turning XRI data recording on/offWhen recording with WAV file formats, the XRI data recordingfunction can be turned on to save recording setting informationat the time of recording as XRI data.When shipped new from the factory, the XRI data recordingfunction is set to ON. To turn the XRI data recording setting off,set the XRI item on the REC SETTING screen to OFF.1. Select the XRI item on the REC SETTING screen. (See “Basicmenu operation procedures” on page 10.)2. Turn XRI data recording ON/OFF.Options: OFF, ON (default)NOTEYou can check and delete XRI data. (See “XRI date the infor-mation page” on page 42.)