101
Aftertouch Transmit
Polyphonic aftertouch is an amazingly expressive tool. But it also generates a lot of control
information, which can clog the MIDI data stream. Setting this to Off still allows both forms of
aftertouch to be used locally but stops them from being transmitted. Mono enables Channel
aftertouch values to be sent (one value for all active voices); Poly allows polyphonic aftertouch
values to be sent.
What is MPE?
MPE stands for “MIDI Polyphonic Expression”. It’s a newer MIDI protocol used mainly by alternate
controllers like Roli instruments, Haken Continuum, and LinnStrument. When active, the voices
of your Hydrasynth break into individual channels so each note can have its own pitch bend,
timbre and pressure control.
Hydrasynth already supports polyphonic aftertouch, so MPE pressure is mapped automatically
to Poly aftertouch. Any patch that uses PolyAftT as a mod source should respond automatically
to pressure sent by an MPE controller.
There are also several mod sources dedicated to MPE. For a list, see
.
Enabling MPE will lock out, change or disable certain system parameters:
• MIDI page 4: MIDI Tx & MIDI Rx = MPE Lock
• MIDI page 5: At TX = MPE Lock
• MIDI page 6: Overflow = MPE Lock (disabled).
MIDI: Page 7
Control with... Function
Settings
Description
Knob 1
Parameter
transmit
Off, NRPN,
CC
Select data format sent by controls
Knob 2
Parameter
receive
Off, NRPN,
CC
Select data format received by parameters
Button 3
Send Patch
(action)
Sends sys-ex of the current patch via MIDI / USB
Button 4
Send All
Patches
(action)
Sends sys-ex of all patches and banks via
MIDI / USB
Knob 5
Overflow [1]
Off, On
Connect two Hydrasynth models for up to
32-voice functionality
Knob 6
Arp TX [1][2]
Off, On
Send Arp note on/off messages via MIDI / USB
Knob 7
Pgm Chg TX
Off, On
Send MIDI Program Change upon patch selection
Knob 8
Pgm Chg RX
Off, On
Receive MIDI Program Change commands
[1] The Arp TX setting has no effect when Overflow is set to On. Overflow must be set to Off to
transmit the arpeggiator notes.
[2] This also toggles the arpeggiator response to incoming MIDI/USB notes.
Parameter send/receive options
These parameters determine whether the
Hydrasynth will transmit (TX) or receive (RX)
7-bit MIDI CC’s or NRPNs during parameter
changes. This allows for more user-friendly
automation on DAWs that do not support the
MIDI NRPN standard.
The CC numbers for each control are listed in
the
.