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It's a little bit off topic and it was posted befote in other thread, but it should be placed here:

LittleGPTracker syncing via audio (as a master) - Tape sync / Sync 24

Hello.

I improved Matt Nida piggy to tape sync:
http://chipmusic.org/forums/topic/1869/ … m-machine/
This is for syncing LGPT with device,that can accept Tape sync signal.

Also I improved this method to use it as SYNC 24 (or DIN SYNC) signal.
This is for syncing LGPT with device,that can accept Sync 24 signal.

In both cases, LGPT must be a Master and you can use only One channel
for normal audio output (= No stereo panning). The second channel is used
for syncing audio signal.

××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××
TAPE SYNC:
××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××

... you can use default pulse from default LGPT samplelibrary (comes in install
folder):
LGPT\install\samplelib\Oscs\square.wav
this is 50/50 duty square cycle

... You can run piggy in normal, not double tempo:

1.Set tempo to 120 BPM, set default groove for other tracks to 06/06
(you have to set GROV00 command in non tape sync tracks/phrases)

2.Set new groove (GROOVE01) for tape sync signal to 03/03

3. Fill Tape sync Phrase with:
D5 I00 GROV 01
D5 I01 GROV 01
D5 I00 GROV 01
D5 I01 GROV 01
D5 I00 GROV 01
D5 I01 GROV 01
D5 I00 GROV 01
D5 I01 GROV 01
D5 I00 GROV 01
D5 I01 GROV 01
D5 I00 GROV 01
D5 I01 GROV 01
D5 I00 GROV 01
D5 I01 GROV 01
D5 I00 GROV 01
D5 I01 GROV 01

(you can use GROV command once, you can use Hop Command ...)

4. Set instrument 00 to:
Sample: LGPT\install\samplelib\Oscs\square.wav
Pan: FE
Root note: C 3
Loop mode: oscillator
Automation: False
Table: 00

Set instrument 01 to:
Sample: LGPT\install\samplelib\Oscs\square.wav
Pan: FE
Root note: C 3
Loop mode: oscillator
Automation: False
Table: 01

5. Set Table 00 to:
PTCH 000C
PTCH 0000
PTCH 000C

Set Table 01 to:
PTCH 0000
PTCH 000C
PTCH 0000

Done!
Tape phrase now runs twice faster, so you can run piggy in normal tempo with 6/6
ticks per note.
Tried with tr 707

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SYNC 24:
××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××

I tried this one on my Win32 LGPT and Prophet64(on real C64)
(connected AudioR-Clock//Pin3 of DIN//,Ground-Ground//Pin2 of DIN//).

Sync24 uses very high volume, so I can't get it from my Dingoo or PSP yet (sorry, no
time for some solution). but that's not a big problem.
you can use some preamp I think
So, here it is:

1.Set default groove for all tracks to 06/06

2.Fill Sync24 Phrase in all 16 (0F) lines with:
D7 I00

3. Set instrument 00 to:
Sample: LGPT\install\samplelib\Oscs\square.wav
Volume: 255 (need highest possible)
Pan: FE
Root note: G 0
Detune: 87
Loop mode: looper sync
Automation: False
Table: --

4. Set volume of your LGPT to highest possible and maybee use some preamp to connect it to Sync 24 input

Done!
Bye.
ryba