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+#ifndef UDO_BUSSING
+#define UDO_BUSSING ##
+/*
+	Bus handling
+	Slim excerpt for Partial Emergence
+
+	This file is part of the SONICS UDO collection by Richard Knight 2021
+		License: GPL-2.0-or-later
+		http://1bpm.net
+*/
+
+gkmastervolume init 1
+
+
+/*
+	Get the stereo L and R names for a singular bus name
+	
+	SnameL, SnameR bus_name Sbus
+
+	SnameL		left bus identifier
+	SnameR		right bus identifier
+
+	Sbus		bus name
+*/
+opcode bus_name, SS, S
+	Sbus xin
+	xout sprintf("%sL", Sbus), sprintf("%sR", Sbus)
+endop
+
+
+/*
+	Read from a stereo bus, but do not clear it
+
+	aL, aR bus_tap Sbus
+
+	aL	left channel
+	aR	right channel
+
+	Sbus	bus name
+*/
+opcode bus_tap, aa, S
+	Sbus xin
+	SbusL, SbusR bus_name Sbus
+	aL chnget SbusL
+	aR chnget SbusR
+	xout aL, aR
+endop
+
+/*
+	Read from a stereo bus, and then clear the bus
+	
+	aL, aR bus_read Sbus
+
+	aL	left channel
+	aR	right channel
+
+	Sbus	bus name
+*/
+opcode bus_read, aa, S
+	Sbus xin
+	SbusL, SbusR bus_name Sbus
+	aL chnget SbusL
+	aR chnget SbusR
+	chnclear SbusL
+	chnclear SbusR
+	xout aL, aR
+endop
+
+
+/*
+	Set to a stereo bus
+
+	bus_set Sbus, aL, aR
+
+	Sbus	bus name
+	aL	left channel
+	aR	right channel
+*/
+opcode bus_set, 0, Saa
+	Sbus, aL, aR xin
+	SbusL, SbusR bus_name Sbus
+	chnset aL, SbusL
+	chnset aR, SbusR
+endop
+
+/*
+	Mix to a stereo bus
+
+	bus_mix Sbus, aL, aR
+
+	Sbus	bus name
+	aL	left channel
+	aR	right channel
+*/
+opcode bus_mix, 0, Saa
+	Sbus, aL, aR xin
+	SbusL, SbusR bus_name Sbus
+	chnmix aL, SbusL
+	chnmix aR, SbusR
+endop
+
+
+/*
+	Mix to master bus
+
+	bus_masterout aL, aR
+
+	aL 	left channel
+	aR	right channel
+*/
+opcode bus_masterout, 0, aa
+	aL, aR xin
+	chnmix aL, "mainL"
+	chnmix aR, "mainR"
+endop
+
+
+instr _mainmixer
+	aL, aR bus_read "main"
+	aL = aL*gkmastervolume
+	aR = aR*gkmastervolume
+	outs aL, aR
+endin
+alwayson "_mainmixer"
+
+#end