Timing
F = Internal timing
on = Original Mode = delayed gate offs
off = tight mode
Gate on/off completely same length (3 clocks on, 3 off)
steht jedefalls als einziges zum Thema timing im manual.
Hab nie kapiert was damit genau gemeint ist.
Siehe paper ganz unten (also wurde das Timing übernommen, frage wie gut? + ich denke nicht dass nur der sequencer/CPU das timing bestimmen. Alle Bauteile an sich wirken sich auf das Timing aus. Welchen Anteil die CPU/Sequencer genau hat die wahrscheinliche Frage, ab hier geht's los
https://www.gearslutz.com/board/showpost.php?p=12549942&postcount=129)
Man hört den Unterschied, manchmal :)
Mit marker ob re oder orig
https://soundcloud.com/basslinesurfer/re303-vs-tb303-comp
Ohne marker anderes pattern
https://soundcloud.com/basslinesurfer/tb303-vs-re303-square
(disclaimer: kann sein dass damals bei der Aufnahme noch ne original CPU verbaut war)
Analysis of the μPD650C-133 CPU timingJulian Schmidt
julian@sonic-potions.com
This paper discusses the timing of the μPD650C-133 CPU used in the Roland TB-303 synthesizer. The original part was connected to a Saleae logic analyzer and various patternshave been analyzed to get an exact idea of the timing used for gate, accent and slide signals generated by the 303 sequencer. The findings of clock latency, impulse length and jitter are discussed and the measurement data is analyzed. The data shows that the gate signal not a static value tied to the tempo clock and is under constant flux due to beating between the tempo clock and the CPUs external interrupt clock. Other signals as slide and accent are tied to the gate signal and show the same timing fluctuations as the gate signal.
[...]
8. CONCLUSION
The interaction of different clock sources and processing times in the interrupt routine in the digital section of theTB-303 brings a noticeable amount of fluctuations to the timing of the TB-303 sequencer. Even if the nuances are small, an emulation of the original TB-303 can not claim to be complete without taking these variations into consid-eration