Cwejman, Doepfer, Erica, MakeNoise, Mutable Instruments, TipTop Audio, Analogue Solutions, and much more! The world’s most popular format.
Be sure to look into OFFICIAL COMPANY FORA as well.
Peouse wrote:Thanks a lot !The problem is the V/Oct trim pot does not allow me to reach 440hz. Its like I reached the maximum potentiometer output. I would get stuck in G4 for exemple if I aim A4.
I'm not sure I understand.
First, did you adjust the INITIAL frequency so that it outputs a 5hz wave when nothing is patched and the frequency knob is fully CCW?
If you have your Sputnik Osc connected to a MIDI-CV interface by patching the CV output into v/oct input on the front panel and you press the key for A0 on your keyboard and then tune the front panel frequency knob so the output of the oscillator is 27.5hz, and then then you press the key for A4 on your keyboard, the CV output from your MIDI-CV interface should increase the frequency of the Sputnik osc into a range close to 440hz so you only have to make minor adjustment.
Disappointment with any module is usually a failure of imagination.
First, did you adjust the INITIAL frequency so that it outputs a 5hz wave when nothing is patched and the frequency knob is fully CCW?
Yes I Have around 5Hz when nothing is connected and frequency knob is fully CCZW.
and then then you press the key for A4 on your keyboard, the CV output from your MIDI-CV interface should increase the frequency of the Sputnik osc into a range close to 440hz so you only have to make minor adjustment.
Thats the problem I am very far from the target when I press A4, thus the trim pot is not enough to catch up with the correct frequency.
Peouse wrote:Thats the problem I am very far from the target when I press A4, thus the trim pot is not enough to catch up with the correct frequency.
What are you using as your reference voltage? Are you using a MIDI-CV interface? If so, which one?
And just to be sure, are you sure you are pressing a key that is four octaves up from the first key?
I use the Eloquenceur to send a steady CV, to setup the note I just Use the interface from the step sequenceur. Do you think I should use another source ?
Peouse wrote:Thats the problem I am very far from the target when I press A4, thus the trim pot is not enough to catch up with the correct frequency.
What are you using as your reference voltage? Are you using a MIDI-CV interface? If so, which one?
And just to be sure, are you sure you are pressing a key that is four octaves up from the first key?
I use the Eloquenceur to send a steady CV, to setup the note I just Use the interface from the step sequenceur. Do you think I should use another source ?
If the Eloquencer is precise, it shouldn't be a problem, but you should measure the voltage it outputs for A0 and then measure the voltage it outputs for A4. A4 has to be precisely +4v more than the voltage output for A0 i.e. 1v/oct over 4 octaves. If the voltage output from the Eloquencer is drooping for some reason, that could explain why you cannot tune to A4.
You could Also try a smaller range just to become familiar with the calibration procedure.
Start with note A3 and turn the frequency knob so the module outputs 220hz, then note A4 and see if you can trim it to 440hz. If you get that working, go to 2 octaves, then 3, etc.
Disappointment with any module is usually a failure of imagination.
If the Eloquencer is precise, it shouldn't be a problem, but you should measure the voltage it outputs for A0 and then measure the voltage it outputs for A4.
I measured with osciloscope, the Voltage is perfect.
You could Also try a smaller range just to become familiar with the calibration procedure.
Start with note A3 and turn the frequency knob so the module outputs 220hz, then note A4 and see if you can trim it to 440hz. If you get that working, go to 2 octaves, then 3, etc.
I just tried this, it works Thanks a lot, I couldnt figured this out by myself! I am going to try more octaves now
Does anyone know what is the core waveform of the Sputnik [single] Oscillator?
This in particular had me wondering: "In the Sputnik oscillator, sine->square, and sine->saw are achieved by wave shaping the sine wave. The sine wave is literally bent into the square and saw shapes. The final square and saw waves are not perfect shapes. The result when modulating the wave shaper is that it will produce different harmonics in the output than would be produced when cross fading a perfect sine to perfect square or saw. The differences are most noticeable when using heavy modulation. People tend to find the results very pleasing to the ear. It's part of the unique qualities of the Buchla 258 upon which the Sputnik Osc is based."
Thanks a lot, I couldnt figured this out by myself! I am going to try more octaves now