Comments (2)
i think this is somewhat expected due to the inaccuracy of the internal crystal that crow clocks based on. we don't have a low-speed clock on the circuit board, so we'll always have +/-3% range to deal with.
this offset shouldn't drift, so we could null it out relatively easily. would require an extra calibration step where you feed a precise frequency oscillation to input[1] and measure the difference.
as you note, the input & output should cancel each other out. this is because the output oscillation are affected in exactly the same way. so.. at least it's internally consistent?
from crow.
Gotcha, thanks for explaining! I never thought through the fact that clock requirements would be different for a microcontroller and a tuner.
I think tuning crow is completely reasonable, especially if it can be done once during a calibration routine. Players can use the pitch pipe output from a tuner or metronome (through some input module, probably) as the pitch reference.
from crow.
Related Issues (20)
- ASL is running at half speed HOT 4
- improve & add documentation HOT 6
- when using `input.mode = 'clock'` sense start/stop
- memory allocation issues with new modules HOT 1
- 'make -j' build successful, but with errors HOT 2
- Updates needed for Disting EX ii support
- `CROW.Q1` gives `ii lines are low` when 2 crows are on bus HOT 4
- ASL modulations HOT 1
- Clear script by self-patching on boot HOT 1
- ceify the metro lib HOT 3
- Clock & Metro libraries are slightly out of sync
- v1.1 hardware changes HOT 8
- v4.0.2RC fails when accessing `input` in druid HOT 2
- Firmware compilation fails under Docker (Windows) with missing GLIBC_2.27 HOT 5
- script clear doesn't seem to purge everything (v4.0.3)
- clock.sync to values less than 1 can cause rapid-firing (v4.0.3) HOT 1
- Crow can fail to boot with Doepfer PSU-3 HOT 3
- Add support for i2c2midi to firmware HOT 7
- simultaneous use of teletype queries and norns crow.send crashes crow HOT 1
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from crow.