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synthio: Calculate LFO.value at construction #9247

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merged 1 commit into from
May 18, 2024

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@jepler jepler commented May 14, 2024

Originally, the only (non-debug) way to make an LFO calculate its value was to associate it with a playing synthesizer.

This posed a problem for LFOs that had "power on values" other than 0, and where the value was used other than to internally drive a note property.

Now, an initial, possibly non-zero value is calculated at object construction time:

>>> l = synthio.LFO(offset = 1)
>>> l.value
1.0

Note that this happens just once at construction; it does not happen when updating LFO properties:

# immediately following the above
>>> l.offset = 2
>>> l.value
1.0

ping @kevinjwalters

@jepler jepler changed the title synthion: Calculate LFO.value at construction synthio: Calculate LFO.value at construction May 14, 2024
Originally, the only (non-debug) way to make an LFO calculate its value
was to associate it with a playing synthesizer.

This posed a problem for LFOs that had "power on values" other than 0,
and where the value was used other than to internally drive a note
property.

Now, an initial, possibly non-zero value is calculated at object
construction time:

```py
>>> l = synthio.LFO(offset = 1)
>>> l.value
1.0
```

Note that this happens just once at construction; it does not happen when
updating LFO properties:
```py
>>> l.offset = 2
>>> l.value
1.0
```
@jepler jepler force-pushed the improve-lfo-initial-value branch from a0b55ec to 9e878f7 Compare May 14, 2024 23:28
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@gamblor21 gamblor21 left a comment

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Tried on an UM FeatherS2, worked as expected.

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@dhalbert dhalbert left a comment

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Thanks, and @gamblor21, thanks for testing!

@dhalbert dhalbert merged commit e0f745c into adafruit:main May 18, 2024
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3 participants