Teac SX-1:SX-1LE Documentation Sony P2 Protocol User Manual
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At 25 Frame (PAL/SECAM), the value 0100 is added to the reply data. (F01A->F11A, etc)
At 24 Frame (FILM), the value 0200 is added to the reply data. (101C->121C etc)
All other frame rates have no effect on the reply data, e.g. 29.97 and 30 frame rates, drop or
non-drop.
*3 If the SX-1 is currently set to emulate the Sony BVU950, the REC command is treated
the same as EDIT ON (20 64), and the HDR will punch in on rec-arm’ed tracks. Otherwise
this command is acknowledged but ignored. See also Note 6.
*4 Speed related commands. The SX-1 supports both single byte and double byte versions of
the standard P2 speed command.
Single data byte: Calculated speed =
−2
32
10
N
where N is the value of the data byte.
For a double data byte command, the 2
nd
data byte is used as a fraction M/256 to linearly
interpolate between the calculated speeds for (1
st
data byte=N) and (1
st
data byte= N+1),
where N is the first data byte and M is the second data byte.
If the 1
st
data byte (N) is zero, the actual speed is 0.0 (Stop), instead of the 1/100 speed as
expected by the above calculation. This is in accordance with many other manufacturers
implementations.
The resolution of the actual speed is 1/1024 normal speed, minimum = 1/1024, maximum is
1536/1024 (1.5x normal play speed). Any speed request greater than 1.5x is treated the
same as a request for 1.5x speed.
The SX-1 will smoothly ramp between the current playing speed and the newly specified
speed, updating the current play speed every 1024 samples (21.3ms at 48KHz). Audio is
reproduced at all supported speed rates.
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