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TC-Helicon Vocal Technologies

www.tc-helicon.com

TC-IVL

VoiceLive MIDI System Exclusive Version 1.2

Hexadecimal Notation

Many values in this document are presented in hexadecimal notation.

Hexadecimal numbers will be prefixed with “0x”.

Example:

Hexadecimal 0x123 = Decimal 291

Decimal 123 = Hexadecimal 0x7B

VoiceLive SYSEX message format:

0xF0 MIDI System exclusive message start

0x00 3 byte manufactors ID for TC-Helicon

0x01 ...

0x38 ...

<Device ID> System exclusive device ID (user parameter)

0x4E VoiceLive model ID

<Message ID> VoiceLive message type identifier

<Data> Start of message data

... Variable number of data bytes based on message type

0xF7 MIDI System exclusive message terminator

Data Packing (24-bit words to 4x7-bit bytes)

The idea of packing data is to take a 24-bit value (the normal width of

parameters in VoiceLive) and represent it as 4 bytes of 7 bits each.

This is done because SYSEX data can only be 7 bits in size. The first

three bytes hold (in sequence) bits 0-6, 7-13 and 14-20 of the 24-bit

value. The fourth byte hold bits 21-23 of the 24-bit value with zeros

in the remaining bits.

For example, If the value of a 24-bit parameter is 614 (0x266), it

would look like “0x66 0x04 0x00 0x00” in a SYSEX message.

Byte1 0x66 = binary X1100110 (abcdefg)

Byte2 0x04 = binary X0000100 (hijklmn)

Byte3 0x00 = binary X0000000 (opqrstu)

Byte4 0x00 = binary X0000000 (****vwx)

Final 24-Bit Value:

vwxopqrs tuhijklm nabcdefg

Total = 00000000 00000010 01100110

= 0x0 0x2 0x66 = 0x000266

Summary of content (10 pages)

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TC-IVL VoiceLive MIDI System Exclusive Version 1.2 Hexadecimal Notation Many values in this document are presented in hexadecimal notation. Hexadecimal numbers will be prefixed with “0x”. Example: Hexadecimal 0x123 = Decimal 291 Decimal 123 = Hexadecimal 0x7B VoiceLive SYSEX message format: 0xF0 0x00 0x01 0x38 0x4E ... 0xF7 MIDI System exclusive message start 3 byte manufactors ID for TC-Helicon ... ...
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Preset numbers Preset numbers are represented in SYSEX messages as 2 bytes (combined 14 bit value). The first byte is the 7 least significant bits and the second is the 7 most significant bits. Preset numbers are mapped as follows: Preset number zero references the current operating preset. Presets numbered 1 through 99 (0x63) reference all stored presets. For example, preset number 67 (0x43) would be translated into bytes 0x43 (LSB) and 0x00 (MSB).
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upon receiving this message will be formatted as a Parameter Data message (see below for complete description). Request Shift Map – 0x51: is 1 byte. The value of this byte is ignored. The data transmitted by VoiceLive upon receiving this message will be formatted as a Shift Map Data message. Request Song Request – 0x14: is 1 byte. It specifies the song number (1 is the first song, 0 is the current song).
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* Custom Correction Scale: A correction scale is represented internally as 12 x 8 bit values packed into 4 x 24 bit words (see the VoiceLive manual for a detailed description). Example: Major Scale Chromatic semitones present: 0, 2, 4, 5, 7, 9, 11 (note count = 7) 12 x 8 bit values: 0, 2, 4, 5, 7, 9, 11, 0, 0, 0, 0, 0 (appended with zeros) At this point an offset of 0x32 is applied to each value for internal purposes. The values are then grouped into 24-bit words.
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The value 169 (decimal) = 1x128 + 41 is represented as bytes 0x01 (MSB) and 0x29 (LSB) The value –43 ~ 16384-43 (decimal) = 16341 = 127*128+85 is represented as bytes 0x7F (MSB) and 0x55 (LSB) Example: Voice 1 bypass state (observable on edit page: CFG2) Off - F0 00 01 38 00 4E 22 00 41 00 00 F7 On - F0 00 01 38 00 4E 22 00 41 00 01 F7 F0 00 01 38 00 4E 22 00 41 00 00 F7 = = = = = = = = = = = = SYSEX start Byte 1 of 3 byte manufacturer’s ID for TC-Helicon Byte 2 of 3 byte manufacturer’s ID for TC-Helicon
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Song Data – 0x12: is 142 bytes. The first byte specifies the song number (from 0 to 49). The next 16 bytes specify a 16 character song name. The next 120 bytes represent song data. Each step of the song is represented by a 24-bit word that is packed into 4 7-bit bytes as described in the data packing section. 30 steps multiplied by 4 bytes per step gives 120 bytes total. Then there is a 24 bit “direct-mode-steps” word that has been packed into four bytes.
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Parameter Grouping and Listing Numbers in this section are shown in decimal notation.
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harm latch harm notesatt harm notesrel thic level thic detune thic spread effe level effe revdlymix effe leadrevsend effe harmrevsend effe auxrevsend effe leaddlysend effe harmdlysend effe auxdlysend effe dly2revsend effe revtype effe revpredlylev effe revdecaytime effe revcolorl effe revcolorh effe dlytype effe dlytime effe dlytempo effe dlyfeedback effe dlyhfdamp cor root cor scale cor win cor att cor amt voice1 bypass voice2 bypass voice3 bypass voice4 bypass harm bypass thic bypass effe bypass cor bypas
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Setup Parameters (Group 1) Parameter Name leadpan lowcut dynamics compthresh compratio gate outrange output samplerate input globaleff tuning midichan midifilt ccctrl globalchord keysplit keydir vibctrl notestrans bendrange notes4chan delaycomp bypass_mode reserved reserved taptempo xped_default ubtn_default dlead_onoff dinst_onoff line_level eqroute lsfreq lcboost hsfreq hcboost midfreq mcboost eq_q lead_level ID 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 3
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harm_level aux_level out_level aux_pan reserved bypass_all direct_a direct_b direct_c direct_d reserved pedcalib pedmin pedmax 41 42 43 44 45 46 47 48 49 50 51 52 53 54 0 0 -100 0 31 61 0 108 reserved 0 1 1 1 1 1 100 100 100 100 0 1 -512 512 -525 512 Configures the four direct mode presets “ ” “ ” “ ” reserved Expression pedal calibration results “ ” “ ” Page 10 TC-Helicon Vocal Technologies www.tc-helicon.