Hi folks,

i need you help urgend.

Oberheim Matrix 1000 Hardware Rack Synth Parameters:

DCO 1/2 Frequency = 0.
Is that A4 (Midi Note 69) = 440 Hz?

What is Frequency value = 32 ?
What is Frequency value = 63 ?

Thank you very much in advance for help!!!!

Regards,
Mike

 

Can't you measure it directly with an android app like DA tuner?

 

I own a Matrix 6, not a 1000, so I'll try to help, but YMMV. What note will play will also depend on whether you are transposing, which is determined by the Ext. Functions mode, extended function 1, Transpose (User's Manual, p. 23, https://medias.audiofanzine.com/files/oberheim-matrix-1000-om-2nd-edition-uk-ocr-472950.pdf). Let us assume you are *not* transposing, i.e., transposition is at 0. Assuming it works like in the Matrix-6 (I suppose it is, but I cannot check) DCO1 frequency value ranges from 0 to +63; at 0, it plays whatever MIDI note you are sending to it (always assuming global transposition is at 0), with no transposition, and each value from 0 to 63 transposes up by that number of semitones. Note that these values only transpose the oscillator up. Transposing down can only be achieved globally, through the Transpose extended function. Of course the DCO setting and the global transpose interact the way you would expect, for example, if the DCO is at 4 (i.e., 4 semitones up) and the global transpose is -12 (1 octave down), the net result is 8 semitones down.

 

brummer10/StompTuner --> https://github.com/brummer10/StompTuner
Multi-format LV2|VST2|VST3|CLAP|AU multi-arch Linux|macOS|Windows Strobe Tuner using the DISTRHO Plugin Framework

Spoiler: Perplexity KI say:

For the actual DCO 1/2 Frequency values, the published parameter table shows the range is stored in semitones, 0 to 63 for the main range and 64 to 127 for the extended range, with the low values representing semitone steps upward from the base pitch. That means:

0 = base pitch / A440 reference
32 = 32 semitones above the base pitch, which is 2 octaves + 8 semitones up
63 = 63 semitones above the base pitch, which is 5 octaves + 3 semitones up

So 32 is not a frequency in Hz, and 63 is not 63 Hz; they are pitch offsets in semitones from the base tuning.

For value 63, the Matrix-1000 parameter table shows that DCO initial frequency is stored in semitones, not directly in Hz. If 0 is the base pitch, then 63 means 63 semitones above the base pitch, which is about 263/12263/12 times higher in frequency.

If you take the base as A4 = 440 Hz, then:

440×263/12≈31438 Hz440×263/12≈31438 Hz
So DCO value 63 is approximately 31.4 kHz relative to A4 = 440 Hz.

That said, on the Matrix-1000 this parameter is usually used as a pitch offset, so the exact audible result depends on the note you play, not just the parameter alone.

 

Last edited: Apr 18, 2026 at 6:02 PM

The OP is asking about the DCO 1/2 frequency parameter (accessible via sysex). Fine tune (global) is a different kettle of fish.