# HG changeset patch # User Mychaela Falconia # Date 1648960766 0 # Node ID 834b5645a123750d7f0336efd21c6acd59ed4d2b # Parent b8ecdf54a957c047a9f2b407cbe1cf5d018f9e20 doc/Buzzer-melodies: note the fact that Mot C1xx official fw uses PWT diff -r b8ecdf54a957 -r 834b5645a123 doc/Buzzer-melodies --- a/doc/Buzzer-melodies Sun Apr 03 04:28:44 2022 +0000 +++ b/doc/Buzzer-melodies Sun Apr 03 04:39:26 2022 +0000 @@ -53,6 +53,10 @@ non-musical tones like SIT that are defined in absolute Hz, then BU will often work better. +Motorola C1xx official firmware uses PWT mode to play its ringtones, both +built-in and user-composed, and we have successfully extracted some of those +professional-quality PWT melodies from at least one C1xx firmware version. + Concept of buzzer melodies ========================== @@ -95,7 +99,7 @@ * Regarding the choice between BU or PWT driving, PWT has been chosen. All melodies created for playing via BUZM need to consist of musical notes F4 through E8 (scientific pitch notation, 349 to 5274 Hz), as supported by - Calypso PWT block. + Calypso PWT block. This design decision matches Mot C1xx official firmware. * Each melody is a sequence of sounded tones (PWT), either directly abutted or separated by pauses. In actual implementation, each melody is a sequence of