14 Commits

Author	SHA1	Message	Date
Luciano Martorella	48c641c15a	- Fix for fixed-point usage in waveform generation	2021-06-07 23:00:12 +02:00
Stuart Longland	a305f66185	waveform: Avoid 16-bit overflow in FP calc ... ``` atinysinth/waveform.c: In function ‘voice_wf_freq_to_period’: atinysinth/waveform.c:107:33: error: result of ‘8000 << 4’ requires 18 bits to represent, but ‘int’ only has 16 bits [-Werror=shift-overflow=] 107 | return (((uint32_t)(synth_freq << PERIOD_FP_SCALE)) / freq); ```	2021-05-20 13:35:26 +10:00
Luciano Martorella	c19c6dddcb	- Added sequencer from binary 'waveform' and ADSR data. ... - Added waveform generic API to create waveforms, and use period instead of frequency in waveform (avoid division on MCUs) - Introduced 'def' struct in ADSR API for reuse - Multi-track MML parser and compilation - Added some samples from https://electronicmusic.fandom.com/wiki/Music_Macro_Language - Added scale.mml for testing	2021-05-18 20:18:29 +02:00
Stuart Longland	0e69a48102	waveform.c: Clean up trailing whitespace	2021-05-18 14:41:34 +10:00
Luciano Martorella	b6bdd2557c	- Fixed fractional frequency	2021-05-16 19:02:33 +02:00
Luciano Martorella	8381065e5b	- Fixed typo	2021-05-16 19:01:43 +02:00
Luciano Martorella	a25fb68071	- Sawtooth wave: overflow fix	2021-05-10 19:47:02 +02:00
Stuart Longland	d1cbf66261	waveform: Add support for frequency scaling. ... For conniseurs of DDS frequency generation, we provide the option of scaling the integer frequency so that frequency may be specified to fractions of 1Hz. This is useful in musical applications where the frequency of most notes is a non-integer value.	2017-07-25 07:59:23 +10:00
Stuart Longland	54f47795ac	waveform: Fix logic errors in triangle synthesis	2017-04-09 07:26:16 +10:00
Stuart Longland	aff9a6c00b	waveform: Flip phase of sawtooth wave.	2017-04-09 07:22:32 +10:00
Stuart Longland	6f7749c0fb	waveform: Increase step to 16-bits. ... Integer overflow was breaking sawtooth output.	2017-04-09 07:19:04 +10:00
Stuart Longland	2a9c5ac4dd	waveform: Fix square wave generation.	2017-04-08 22:02:02 +10:00
Stuart Longland	5c90525e01	waveform: Add debugging	2017-04-08 20:55:38 +10:00
Stuart Longland	84370bd932	ADSR-based synthesizer for microcontrollers ... Initial check-in.	2017-04-08 18:57:37 +10:00