CASIO PX-320 (01) PDF Document

As a MIDI device, the CASIO PX-320 consists of three main sections that send and receive specific MIDI messages:

System Section:

• Device Settings

Sound Generator Section:

• Common

– Sound Generator Common Block

– System Effect Block

– Master Effect Block (Brilliance Function)

– Mixer Master Block

• Channel Independent

– Instrument Parts

– Insertion Effect Block

– Mixer Channel Independent Block

Performance Controller Section:

• Keyboard

• Pedal and other real-time controllers

• Auto Accompaniment function

The CASIO PX-320 has fixed relationships between part numbers, MIDI channels, and their assigned functions. The sound generator has 32 parts, but channel messages can only control Group B. The assignments are as follows:

All MIDI message sending and receiving on the CASIO PX-320 is temporarily disabled while any of the following processes are in progress:

• Demo data performance in progress

• Music Library data performance in progress

• SD memory card format in progress

Note On (9nH kkH vvH)

• Send: Sent when a key is played on the keyboard.

• Receive: Received over MIDI channels corresponding to each part. A part that is turned off by the Part Enable Parameter is not received.

Note Off (8nH kkH **H or 9nH kkH 00H)

• Send: Sent when a key is released on the keyboard.

• Receive: Received over MIDI channels corresponding to each part. The velocity value is ignored. A part that is turned off by the Part Enable Parameter is not received.

Polyphonic Key Pressure: No, this message is not sent or received by the CASIO PX-320.

Channel Aftertouch: While the CASIO PX-320 can receive Channel Aftertouch messages to add modulation to a sounding voice, it does not send these messages.

The CASIO PX-320 sends a Hold1 (40H) message when a pedal with a sustain (damper) function is operated. When received, it performs an operation equivalent to the sustain pedal. The specific operation depends on the Timbre Type setting:

• Timbre Type: Melody
Performs a standard sustain on/off control based on the received value (0-63 for Off, 64-127 for On).

• Timbre Type: Piano
Allows for continuous control (half-pedaling). The piano tone’s decay rate and the Acoustic Resonance effect are continuously controlled based on the received message value (0-127).

• Timbre Type: Drum
The received message does not affect the sound source operation.

Additionally, when a part using Acoustic Resonance receives this message, the resonance characteristics are continually altered.

The CASIO PX-320 does not send these messages but can receive General Use Controller messages to control DSP operation. These messages correspond to the elements of the 7-bit DSP Parameter7 array.

A received MIDI value (0-127) is converted to fit the applicable parameter’s setting range using the following formula:

Parameter Setting Value = Parameter Minimum Value + (Parameter Maximum Value – Parameter Minimum Value) × (Received Value / 127)

Each tone on the CASIO PX-320 has a “Timbre Type” parameter that specifies how the sound source operates, particularly in response to the damper pedal. There are three types:

• Timbre Type: Melody
This type is optimized for normal melody tones. It performs a standard on/off damper pedal operation.

• Timbre Type: Piano
This setting is optimized for piano tones. It allows for continuous control where the decay rate of the voice and the Acoustic Resonance effect characteristics are altered in accordance with the damper pedal position (supporting half-pedal effects).

• Timbre Type: Drum
This setting is optimized for drum sounds. The damper pedal does not function for tones with this timbre type.

The CASIO PX-320 has four DSP lines that can be used simultaneously. The number of lines required depends on the selected tone:

• Tones listed as “Monaural Tone DSP” use one DSP line.

• Tones listed as “Stereo Tone DSP” use two DSP lines.

If you select multiple tones with DSP and there are not enough available lines, the last selected tone is given priority. Previously used DSP lines will be released and reassigned to the new tone.

To maximize DSP availability, multiple parts can share the same DSP line if all of the following settings are identical:

• Tone Number

• Part Volume

• Part Pan

• All DSP parameters

When parts share a DSP line, changing a parameter on one part will affect all other parts sharing that line.

These parameters allow an external device to check the status of the instrument. They are read-only (R).

These parameters configure settings for each individual part. The “Block” column indicates that these settings are per part, specified by the Part Number (0-4).

The following is a list of tones on the CASIO PX-320 that utilize the built-in DSP (Digital Signal Processor) and their corresponding DSP algorithms.

The CASIO PX-320 includes several built-in DSP algorithms, categorized by their input/output type.

Monaural Tone DSP

Stereo Tone DSP

The following tables show the relationships between MIDI transmit/receive values and their corresponding parameter settings on the CASIO PX-320.

Off/On Setting Value Table

Slow/Fast Setting Value Table

Rotate/Brake Setting Value Table

Pan Setting Value Table

-64 – 0 – 63 Setting Value Table