scales/modes?

[jwaldmann]

I wanted to use the diatonic scale, and transpose inside the scale. E.g.,
transpose 1 c should give d (whole note up), but transpose 1 e should give f (semi note up),
and a chord is [x, x+2, x+4], giving major, minor, or dim, depending on x.
Electribe2 does have such a chord mode.

Euterpea has chromatic scale everywhere, because MIDI does.

Still the source code (and API docs) mention Mode. But it's never used?

rg Major Euterpea2/
Euterpea2/Euterpea/Music.lhs
38:> data Mode = Major | Minor |

Euterpea's class ToMusic is already designed (I guess) to handle this:

One can make a newtype

data Diatonic = Diatonic Int

and define conversion to chromatic (via some table lookup)

instance ToMusic1 Diatonic where 
  toMusic1 = mMap ( \ (Diatonic i) -> (pitch _,  _) ) 

Then, transposition in the scale works

tr_dia d = mMap (\ (Diatonic i) -> Diatonic (i+d))

play $ tr_dia 2 $ note 1 $ Diatonic 0

The nice thing is that the type system will prohibit a confusion of scales (using a diatonic number as it were chromatic).

[jimstutt]

Maybe I'm missing something but I don't see how a Diatonic syntax of eg. Major|Minor|Diminished etc (x,x+2,x+4) would be useful or could easily be used if I have chords like C7b9#5.

…

On Thu, Dec 9, 2021 at 6:25 PM jwaldmann ***@***.***> wrote: I wanted to use the diatonic scale, and transpose inside the scale. E.g., transpose 1 c should give d (whole note up), but transpose 1 e should give f (semi note up), and a chord is [x, x+2, x+4], giving major, minor, or dim, depending on x. Electribe2 does have such a chord mode. Euterpea has chromatic scale everywhere, because MIDI does. Still the source code (and API docs) mention Mode. But it's never used? rg Major Euterpea2/ Euterpea2/Euterpea/Music.lhs 38:> data Mode = Major | Minor | Euterpea's class ToMusic is already designed (I guess) to handle this: One can make a newtype data Diatonic = Diatonic Int and define conversion to chromatic (via some table lookup) instance ToMusic1 Diatonic where toMusic1 = mMap ( \ (Diatonic i) -> (pitch _, _) ) Then, transposition in the scale works tr_dia d = mMap (\ (Diatonic i) -> Diatonic (i+d)) play $ tr_dia 2 $ note 1 $ Diatonic 0 The nice thing is that the type system will prohibit a confusion of scales (using a diatonic number as it were chromatic). — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#50>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAFX6DRU275JA6PR5EHGBGTUQDYDNANCNFSM5JXE6SXA> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>.

[jwaldmann]

Yes, it'd be limited to notes in the scale. For diatonic, you'd get the things you can play "on the white keys", etc. I was thinking mainly for teaching. For making actual music, it's quite a restriction. But that's not necessarily bad? - Related:

• Electribe2 (Korg) has this mode for chords, and for (quasi random) notes from the touchpad
• Tidal Cycles http://tidalcycles.org/docs/reference/harmony_melody#scales

[jimstutt]

Tnx for the link to Electribe2; I've failed to get Tidal Cycles working so far. White notes are definitely a bad restriction if you're a Bartok fan like me :)

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On Sat, Dec 11, 2021 at 11:12 PM jwaldmann ***@***.***> wrote: Yes, it'd be limited to notes in the scale. For diatonic, you'd get the things you can play "on the white keys", etc. I was thinking mainly for teaching. For making actual music, it's quite a restriction. But that's not necessarily bad? - Related: - Electribe2 (Korg) has this mode for chords, and for (quasi random) notes from the touchpad - Tidal Cycles http://tidalcycles.org/docs/reference/harmony_melody#scales — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#50 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAFX6DUK6IDMTX5ASHC6WTDUQPLHVANCNFSM5JXE6SXA> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>.