Sony M25AE User Manual

Chapter 2

Playback and Recording

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(This unit and other equipment for professional use may be functionally extended. For details, see the notes below 
the table.) 

1) The unit cannot record 4-channel sound of HDV format.
2) There are two modes for audio signal recording: Lock mode and Unlock mode. In Lock mode, the sampling frequencies of 

audio and video are synchronized. In Unlock mode, adopted by the consumer DV format, the two sampling frequencies are 
independent. Lock mode maintains high compatibility with higher formats and offers better digital processing and smoother 
transition than Unlock mode when you edit audio. 

3) The unit cannot record in DV format with 16 bit: 32 kHz or 44.1 kHz. 
4) The unit has been functionally extended with a function for switching between Lock mode and Unlock mode. 
5) The unit has been functionally extended with a function to enable selecting DF/NDF and user bits setting for 60i (including 

24p and 30p) with HDV or DV (SP) format. 

Track pitch

10 µm

15 µm

10 µm

Audio sampling frequency

16 bit: 48 kHz

12 bit: 32 kHz
16 bit: 48 kHz

12 bit: 32 kHz 
16 bit: 32 kHz, 44.1 kHz, 48 kHz

 3)

Audio recording mode

 2)

Lock mode

Lock mode

Unlock mode

 4)

Time code

Drop frame mode 
(60i/24p/30p only)

 5)

 

No user bits

 5)

NTSC: SMPTE time code 
(DF/NDF, including user bits) 
PAL: EBU time code 
(including user bits)

Drop frame mode 
(NTSC only)

 5)

 

No user bits

 5)