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I'd like to deploy an MVP version of this application today, so I'm dropping
support for a few features to focus my efforts. I may bring these features
back.
TL;DR:
- Temporarily drop support for "Fine Tune" tab of preferences
- Sort keys by the Circle of Fifths
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For now since I'm the only customer and I'm primarily making this for myself,
I'm styling the app specifically for my Google Pixel 4. If I find this app
useful, I will consider supporting other devices.
I'm using the Icons that I bought when I purchased the "Refactoring UI" book.
Other news:
- I bought the domain learnpianochords.app!
What's left:
- Style the "fine tune" tab of the preferences view
- Better support non-mobile devices like the browser and tablet devices
- Deploy the application to learnpianochords.app
- Redesign the "key" tab of the preferences view to sort the keys according to
the circle of fifths
- Dogfood
- Simplify until I cannot simplify anymore
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Start styling the Chord Drill Sergeant for mobile devices because that is that
device on which I will primarily use CDS.
I'm also deleting the debugger related code. I would like to support a debugger,
but I'm not currently using this one, so I am going to remove it to keep things
slender.
- Introduce TailwindCSS, which also introduced elm-live, index.html, index.css
- Add mobile-first styling for the preferences modal
- Remove unused code
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Generate chords for a given key.
I believe my Theory.allChords function is taking a long time to generate all of
the chord possibilities. I would like to profile this to verify this
assumption. I think I can create a "staging area" for changes and only
regenerate chords when "committing" the options from the "staging area". This
should stress the application less.
TODO: Profile application to find bottleneck.
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I was using this to debug a feature that I no longer need to debug.
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For the past two to three days, I've been searching for the name for the concept
of "C" or "A". From what I read, notes are specific things like C0 or C4, but I
wanted the name of the concept of a C. Thankfully today I discovered that this
is called a pitch class.
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Until the user presses play, we shouldn't display any chords.
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Often I want to practice only C, F, and G-chords in all inversions. Next I'd
like to only support the chords for various keys.
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Only show the chords that we can fit on the piano.
TODO: Debug occasional instance where we render chords that do not fit. I am
unsure how to reproduce these states at the moment.
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I'm not sure how valuable it is to study all of the inversions of the suspended
chords. Maybe it is. I'll let the users decide.
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Allow and disallow chords by the type of chords.
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Add checkboxes to support various chord positions.
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While I did change a lot of functionality, I also ran `elm-format` across the
codebase, which makes these changes a bit noisy.
Here is the TL;DR:
- Properly support chord inversions
- Ensure that the piano styling changes dynamically when I change the variables
like `naturalWidth`
- Add start and end notes to define the size of the piano and which chords we
create
- Support elm-format and run it across entire project
- Debug Misc.comesBefore
- Introduce a ChordInspector and debugger
TODO: Ensure that we only generate chords where all of the notes can be rendered
on the displayed keys.
TODO: Add preferences panel, so that I can do things like "Practice blues chords
in C and E with chord substitutions."
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Remodel application to support the scientific pitch notation for notes. Instead
of supporting simply "C", support "C4". This change created cascading
changes. After refactoring for around an hour, I restored the app to a working
state. The current state is not desirable, but it compiles. More changes on the
way.
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Define two functions for attempting to return an element in a list that precedes
or succeeds another element.
I prefer having something like Utils.List. Perhaps I will refactor.
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Using BPM as the unit for tempo.
TODO: Consider a higher-fidelity way to calculate BPM, although I'm not sure
this is critical functionality; an interesting problem is just seducing me, and
this app would be better off resisting the temptation.
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Use an org file to track random ideas or features or improvements.
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Elm reminds me of Haskell. In fact, I'm using `haskell-mode` (for now) in Emacs
to write my Elm code, and it works reliably. I'm not writing a Haskell app, but
if I were, I would define my application Model with the following Haskell code:
```haskell
data Model = Model { whitelistedChords :: [Theory.Chord]
, selectedChord :: Theory.Chord
, isPaused :: Bool
, tempo :: Int
}
```
When I first modelled my application state, I did something similar. After
reading more Elm examples of SPAs, I see that people prefer using type aliases
to define records. As far as I know, you cannot do this in Haskell; I believe
all types are "tagged" (something about "nominal typing" comes to mind). Anyhow,
Elm isn't Haskell; Haskell has cool features like type classes; Elm has cool
features like human-readable error messages and exhaustiveness checking for
cases. I love Haskell, and I love Elm, and you didn't ask.
Anyhow, this commit refactors my records as type aliases instead of types. I
think the resulting code is more readable and ergonomic.
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Supporting Play/Pause events, and Increase/Decrease tempo.
TODO: Convert milliseconds to BPM
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Create a more convincing representation of the piano.
I would like to compute the left-offset based on the naturalWidth. That change
is probably forthcoming.
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First of all, Elm's purity is beautiful. I think every language should model
their error messages and develop experience after Elm. If I didn't have to
download packages, I don't think I would need an internet connection to
troubleshoot my program's errors. This is how helpful I find the compiler.
Now that that's out of the way, here's what I've changed since we've last
corresponded:
- Use Elm's Browser.element to create a reactive application with state
- Write a function to generate all of the chords about which CDS knows
- Move some code out of Main.elm into other modules
- Depend on List.Extra, Random, Random.Extra
What's left:
- Lots of work
- Instead of clicking a button to show a new chord, use a timer
- Add mobile-first styling (probably add TailwindCSS)
- Persist settings in LocalStorage (and then eventually create user accounts)
- Allow users to curate the list of chords they're interested in practicing
- Deploy the website and dogfood it
Unknowns:
- How can I handle tempo? I don't expect setInterval to be enough (maybe it
is)...
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Initialize an Elm application to build a MVP for the Chord Drill Sergeant
application. There isn't much to see at the moment. I'm just sketching
ideas. More forthcoming...
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See the README for more information.
I've wanted to use an application like this for awhile. I would like to start
developing this soon.
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