remove ivoice (deprecated)

synth/ivoice.h

@@ -1,30 +0,0 @@
-#pragma once
-
-#include "audio_buffer.h"
-#include <vector>
-
-namespace trnr {
-template <typename t_sample>
-struct ivoice {
-	virtual ~ivoice() = default;
-	virtual void process_samples(t_sample** _outputs, int _start_index, int _block_size,
-								 std::vector<audio_buffer<t_sample>> _modulators = {}) = 0;
-	virtual bool is_busy() = 0;
-	virtual void set_samplerate(double samplerate) = 0;
-	virtual void note_on(int _note, float _velocity) = 0;
-	virtual void note_off() = 0;
-	virtual void modulate_pitch(float _pitch) = 0;
-};
-
-// check if a template derives from ivoice
-template <class derived, typename sample>
-struct is_convertible {
-	template <class T>
-	static char test(T*);
-
-	template <class T>
-	static double test(...);
-
-	static const bool value = sizeof(test<ivoice<sample>>(static_cast<derived*>(0))) == 1;
-};
-} // namespace trnr