RAW (Read After Write / VTH - Virtual Third Head) digitally mimics the third head of a three head tape deck. When on and the PMD671 is recording, the audio that is output to the LINE OUT, DIGI OUT, PHONES and SPEAKER is audio that has already been written to the CF card and not audio from the source. This allows you to actually listen to audio written to the CF card, monitoring that the recording is actually taking place. When RAW is off, the audio to the LINE OUT, DIGI OUT, PHONES and SPEAKER is actually the source you are recording.
Time Shift (Time Shift Playback)Time Shift Playback works just like RAW, in that it monitors audio that has already been recorded to the CF card. However, Time Shift allows you the ability to listen to audio from anywhere on the card while simultaneously recording the current audio source.
FILE: During recording, output to the PHONES and LINE OUT jacks is read from the CF card.
When the Time Shift feature is on and the MONITOR switch is set to file, as you begin recording the outputs (for example headphones) monitor the source. While recording is in progress, you
can press and release the 
to search back through and play the file that is being recorded (to the point you began the Time Shift).
Audio played back through the headphones can be anywhere on the CF card. You can use the
TRACK JUMP reverse 
or TRACK JUMP
forward 
buttons to change tracks.
Press and release the PLAY/PAUSE button 
to return to monitoring the current recording.
Notes:
•In some instances, Verify and RAW or Time Shift are available simultaneously (see charts below).
•When using RAW (Read After Write) to monitor informa- tion already written to the CF card, the audio played back will be about 2 seconds behind current events.
•RAW and Time Shift are only available individually. Never at the same time.
•Not available when making
SOURCE: During recording, output to the PHONES and LINE OUT jacks is the audio source being recorded.
Factory defaults: MONITOR switch: SOURCE,
Presets 1, 2, and 3: RAW at MONITOR.
Notes:
•Active level meters verify that an audio source is being received by the PMD671.
•Another way to verify that audio is being recorded is to turn on the VERIFY menu choice (see page 35). When VERIFY is ON, the PMD671 constantly compares the recorded information to the source input. It verifies that the file written to the card is exactly what was input.
•MONITOR is not available in 24 bit recording, or available for MP2.
•MONITOR is available for 16 bit PCM recording and MP3.
•An audio drop out may occur when using RAW at high bit rates in MP3.
Time Shift lets you select the Read After Write time delay. Time Shift playback allows you to play audio that has already been recorded from anywhere on the CF card while simultaneously recording the current audio. This is useful in applications such as court recording.
The chart below details which features are available during which RecFormats.
PCM | PCM | MP2 |
Verify |
| n/a |
RAW, Time Shift | n/a | n/a |
Additionally, Verify is available for use at the same time as RAW (Read After Write) or Time Shift (Time Shift Playback) in the following circum- stances:
PCM | PCM | MP3 with RAW / | |
RAW / Time Shift | Time Shift | ||
|
Verify
- 14 -