Post by jimread on Aug 31, 2022 20:05:24 GMT
Hello all,
I haven't done much recently mainly because of not being able to tune anything or even get two oscillators close to each other.
I recalled seeing a tuner on Eddy Bergmans site, bought one and then did the mods Eddy suggests. www.eddybergman.com/2020/04/synthesizer-extras-part-2-joyo.html This was using the same resistors Eddy used, result, nothing!
Removed the resistors and used my little oscilloscope to check output voltages on the likes of the Headphone output, mostly of the minus quantity, oddly even when reversing the connections! After a cup of tea and some thought ahhhhh the Master I/O and checked that, positive to 2.5 Volts, again even with the connections reversed.
Put the mono 3.5mm plug in and there we go, I was able to tune 2 oscillators to B easily, normally blue but goes green when smack on the note.
Hooray I thought - Jim
I haven't done much recently mainly because of not being able to tune anything or even get two oscillators close to each other.
I recalled seeing a tuner on Eddy Bergmans site, bought one and then did the mods Eddy suggests. www.eddybergman.com/2020/04/synthesizer-extras-part-2-joyo.html This was using the same resistors Eddy used, result, nothing!
Removed the resistors and used my little oscilloscope to check output voltages on the likes of the Headphone output, mostly of the minus quantity, oddly even when reversing the connections! After a cup of tea and some thought ahhhhh the Master I/O and checked that, positive to 2.5 Volts, again even with the connections reversed.
Put the mono 3.5mm plug in and there we go, I was able to tune 2 oscillators to B easily, normally blue but goes green when smack on the note.
Hooray I thought - Jim
