from AudioToolbox import * from CoreMIDI import * # ========== DLS AU GRAPH ========== graph = AUGraph() NewAUGraph(byref(graph)) cd = AudioComponentDescription() cd.componentManufacturer = kAudioUnitManufacturer_Apple cd.componentType = kAudioUnitType_MusicDevice cd.componentSubType = kAudioUnitSubType_DLSSynth cd.componentFlags = 0 cd.componentFlagsMask = 0 synthNode = AUNode() AUGraphAddNode(graph, byref(cd), byref(synthNode)) cd.componentType = kAudioUnitType_Effect cd.componentSubType = kAudioUnitSubType_PeakLimiter limiterNode = AUNode() AUGraphAddNode(graph, byref(cd), byref(limiterNode)) cd.componentType = kAudioUnitType_Output cd.componentSubType = kAudioUnitSubType_DefaultOutput outNode = AUNode() AUGraphAddNode(graph, byref(cd), byref(outNode)) AUGraphOpen(graph) AUGraphConnectNodeInput(graph, synthNode, 0, limiterNode, 0) AUGraphConnectNodeInput(graph, limiterNode, 0, outNode, 0) outSynth = AudioUnit() description = AudioComponentDescription() AUGraphNodeInfo(graph, synthNode, byref(description), byref(outSynth)) AUGraphInitialize(graph) AUGraphStart(graph) CAShow(graph) volume = AudioUnitParameterValue(10) AudioUnitSetParameter(outSynth, kMusicDeviceParam_Volume, kAudioUnitScope_Global, 0, volume, 0) # ========== CORE MIDI ========== delegate = None # typedef void (*MIDIReadProc)(const MIDIPacketList *pktlist, void *readProcRefCon, void *srcConnRefCon); def readProc(pktlist, readProcRefCon, srcConnRefCon): packet = pktlist.contents.packet[0] status = packet.data[0] data1 = packet.data[1] data2 = packet.data[2] if delegate: delegate(status, data1, data2) callback = CFUNCTYPE(None, POINTER(MIDIPacketList), c_void_p, c_void_p)(readProc) client = MIDIClientRef() client_name = CFStringCreateWithCString(None, __file__, kCFStringEncodingUTF8) MIDIClientCreate(client_name, None, None, byref(client)) input_port = MIDIPortRef() input_name = CFStringCreateWithCString(None, "I_PORT", kCFStringEncodingUTF8) MIDIInputPortCreate(client, input_name, callback, None, byref(input_port)) output_port = MIDIPortRef() output_name = CFStringCreateWithCString(None, "O_PORT", kCFStringEncodingUTF8) MIDIOutputPortCreate(client, output_name, byref(output_port)) def getSources(): names = [] for i in range(MIDIGetNumberOfSources()): src = MIDIGetSource(i) names.append(getMIDIDisplayName(src)) return names def getDestinations(): names = [] for i in range(MIDIGetNumberOfDestinations()): des = MIDIGetDestination(i) names.append(getMIDIDisplayName(des)) return names def getMIDIDisplayName(endpoint): cf_string = CFStringCreateWithCString(None, c_char_p(b""), kCFStringEncodingUTF8) cf_name_key = CFStringCreateWithCString(None, kMIDIPropertyDisplayName, kCFStringEncodingUTF8) MIDIObjectGetStringProperty(endpoint, cf_name_key, byref(cf_string)) c_string_buffer = ctypes.create_string_buffer(64) CFStringGetCString(cf_string, c_string_buffer, 64, kCFStringEncodingUTF8) py_string = c_string_buffer.value.decode("utf-8") if py_string != "" : return py_string else: return "< Unknown Endpoint >" current_src = None current_dest = None def setInput(index): global current_src if current_src: MIDIPortDisconnectSource(input_port, current_src, None) if index > 0: current_src = MIDIGetSource(index-1) MIDIPortConnectSource(input_port, current_src, None) def setOutput(index): global current_dest if current_dest: current_dest = None if index > 0: current_dest = MIDIGetDestination(index-1) def sendEvent(status, data1, data2): if current_dest: packet = MIDIPacket( timeStamp=0, length=3, data=(Byte*256)(status, data1, data2)	) pktlist = MIDIPacketList( numPackets=1, packet=(MIDIPacket*1)(packet)	) MIDISend(output_port, current_dest, pktlist) else: MusicDeviceMIDIEvent(outSynth, status, data1, data2, 0) def softsynth_program_change(number): MusicDeviceMIDIEvent(outSynth, 0xC0, number, 0, 0)