From f8e5a84bd1f1bc52a1ab18b37387f064752d400b Mon Sep 17 00:00:00 2001
From: Ellen Arvidsson <ellen@log-e.se>
Date: Wed, 18 Jun 2025 12:57:17 +0200
Subject: [PATCH] remove drum code and read from audio hw instead

---
 daisy/scope/osclsk.cpp |   2 +-
 daisy/scope/osclsk.hpp |   2 +-
 daisy/scope/scope.cpp  | 100 ++---------------------------------------
 3 files changed, 6 insertions(+), 98 deletions(-)

diff --git a/daisy/scope/osclsk.cpp b/daisy/scope/osclsk.cpp
index 7744024..853158b 100644
--- a/daisy/scope/osclsk.cpp
+++ b/daisy/scope/osclsk.cpp
@@ -201,7 +201,7 @@ osclsk_scope::is_triggering(float sample)
 void
 osclsk_scope::trig_lkb_wr_block(void)
 {
-	size_t lkb_start, n;
+	size_t lkb_start;
 	size_t lkb_cpy, lkb_cpy_part;
 
 	if (trig_mode == osc_trig_mode::INSTANT)
diff --git a/daisy/scope/osclsk.hpp b/daisy/scope/osclsk.hpp
index 96a82c1..de27549 100644
--- a/daisy/scope/osclsk.hpp
+++ b/daisy/scope/osclsk.hpp
@@ -12,7 +12,7 @@ using namespace daisy;
 #define OSCLSK_SCREEN_YSZ ILI9341_TFTWIDTH
 
 
-#define OSCLSK_RATE_DIV		48
+#define OSCLSK_RATE_DIV		16
 #define OSCLSK_LKB_AMOUNT	10
 
 #define OSCLSK_BLOCK_LEN	OSCLSK_SCREEN_XSZ
diff --git a/daisy/scope/scope.cpp b/daisy/scope/scope.cpp
index fe75e89..d5bd58c 100644
--- a/daisy/scope/scope.cpp
+++ b/daisy/scope/scope.cpp
@@ -26,13 +26,6 @@ uint8_t DMA_BUFFER_MEM_SECTION dma_area[DMA_AREA_SIZE];
 static void audio_cb(AudioHandle::InputBuffer in,
     AudioHandle::OutputBuffer out, size_t sz);
 
-Oscillator osc;
-WhiteNoise noise;
-
-AdEnv kickVolEnv, kickPitchEnv, snareEnv;
-
-Switch kick, snare;
-
 RingBuffer<float, SCOPE_RING_BUF_SIZE>	scope_in;
 
 void
@@ -42,52 +35,15 @@ audio_cb(AudioHandle::InputBuffer in,
 #ifdef AUDIOC_DEBUG
 	load_meter.OnBlockStart();
 #endif
-	float osc_out, noise_out, snr_env_out, kck_env_out;
 	float sig[AUDIO_BLOCK_SIZE];
+	size_t i;
 
-	//Get rid of any bouncing
-	snare.Debounce();
-	kick.Debounce();
-
-	//If you press the kick button...
-	if(kick.RisingEdge())
-	{
-		//Trigger both envelopes!
-		kickVolEnv.Trigger();
-		kickPitchEnv.Trigger();
-	}
-
-	//If press the snare button trigger its envelope
-	if(snare.RisingEdge())
-	{
-		snareEnv.Trigger();
-	}
-
-	//Prepare the audio block
-	for(size_t i = 0; i < sz; i++)
-	{
-		//Get the next volume samples
-		snr_env_out = snareEnv.Process();
-		kck_env_out = kickVolEnv.Process();
-
-		//Apply the pitch envelope to the kick
-		osc.SetFreq(kickPitchEnv.Process());
-		//Set the kick volume to the envelope's output
-		osc.SetAmp(kck_env_out);
-		//Process the next oscillator sample
-		osc_out = osc.Process();
-
-		//Get the next snare sample
-		noise_out = noise.Process();
-		//Set the sample to the correct volume
-		noise_out *= snr_env_out;
-
-		//Mix the two signals at half volume
-		sig[i] = .5 * noise_out + .5 * osc_out;
+	for (i = 0; i < sz; i++) {
+		sig[i] = in[0][i];
 	}
 
 	/* write to output */
-	for (size_t i = 0; i < sz; i++) {
+	for (i = 0; i < sz; i++) {
 		out[0][i] = sig[i];
 		out[1][i] = sig[i];
 	}
@@ -99,51 +55,6 @@ audio_cb(AudioHandle::InputBuffer in,
 #endif
 }
 
-static void
-setup_drums(void)
-{
-	float samplerate;
-
-	/* kick n snare */
-	samplerate = daisy_hw.AudioSampleRate();
-
-	//Initialize oscillator for kickdrum
-	osc.Init(samplerate);
-	osc.SetWaveform(Oscillator::WAVE_TRI);
-	osc.SetAmp(1);
-
-	//Initialize noise
-	noise.Init();
-
-	//Initialize envelopes, this one's for the snare amplitude
-	snareEnv.Init(samplerate);
-	snareEnv.SetTime(ADENV_SEG_ATTACK, .01);
-	snareEnv.SetTime(ADENV_SEG_DECAY, .2);
-	snareEnv.SetMax(1);
-	snareEnv.SetMin(0);
-
-	//This envelope will control the kick oscillator's pitch
-	//Note that this envelope is much faster than the volume
-	kickPitchEnv.Init(samplerate);
-	kickPitchEnv.SetTime(ADENV_SEG_ATTACK, .01);
-	kickPitchEnv.SetTime(ADENV_SEG_DECAY, .05);
-	kickPitchEnv.SetMax(400);
-	kickPitchEnv.SetMin(50);
-
-	//This one will control the kick's volume
-	kickVolEnv.Init(samplerate);
-	kickVolEnv.SetTime(ADENV_SEG_ATTACK, .01);
-	kickVolEnv.SetTime(ADENV_SEG_DECAY, 1);
-	kickVolEnv.SetMax(1);
-	kickVolEnv.SetMin(0);
-
-	//Initialize the kick and snare buttons on pins 27 and 28
-	//The callback rate is samplerate / blocksize (48)
-	snare.Init(daisy_hw.GetPin(27), samplerate / (float)AUDIO_BLOCK_SIZE);
-	kick.Init(daisy_hw.GetPin(28), samplerate / (float)AUDIO_BLOCK_SIZE);
-}
-
-
 #define LOAD_FREQ	5
 #define LOAD_PERIOD	(1000u / LOAD_FREQ)
 int
@@ -167,13 +78,10 @@ main(void)
 
 	scope_in.Init();
 
-	setup_drums();
-
 	daisy_hw.StartAudio(audio_cb);
 
 	while (true) {
 
-
 		switch (scope.state()) {
 		case osclsk_scope::osc_state::SAMPLE_DONE:
 			scope.render_block();