User manual LEXICON MPX 1 V1.10 MIDI IMPLEMENTATION DETAILS

[. . . ] MPX 1 V1. 10 MIDI Implementation Details © 1998, Lexicon, Inc. · 3 Oak Park · Bedford MA 01730-1441 · Tel: 781 280-0300 · Fax: 781 280-0490 Lexicon Part No. 070-11835 Rev 1 Printed in U. S. A. Contents Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Data Formatting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] The Routing field defines how the particular block deals with the upper and lower audio paths. The following type of Routing have been defined: 0 - Upper 1 - Lower 2 - Parallel 3 - Merge 4 - Split 29 MPX 1 V1. 10 MIDI Implementation Details Lexicon Upper and Lower routings place the effect block in the upper or lower signal path ONLY. Parallel routing makes the effect take its input from both the upper and lower paths, then outputs to both the upper and lower paths. Merge routing takes its input from both the upper and lower paths, but outputs only on the upper path. Split routing takes its input from the upper path and outputs on both the upper and lower paths. Path Type defines whether a given effect block is on a single or double path. Some Routings imply the Path Type, but others, such as "Upper", do not. The following Path Types have been defined: 0 - Single Path 1 - Double Path Example Value 0x06 0x00 0x00 0x04 0x01 0x02 0x03 0x00 0x00 0x01 0x03 0x00 0x04 0x01 0x01 0x00 0x00 0x00 0x00 0x01 0x01 0x00 0x00 0x03 0x01 0x05 0x00 0x00 0x00 0x00 0x04 0x00 0x00 0x00 0x00 0x07 0x00 0x00 0x00 0x00 Description Effect type: Input block Upper input connector: not used Lower input connector: not used Routing: Split Patch type: Double path Effect type: EQ block Upper input connector: Left to Left and Right (mono) Lower input connector: Stereo to Stereo Routing: Upper Patch type: Double path Effect type: Modulator block Upper input connector: Stereo to Stereo Lower input connector: Right to Left and Right (mono) Routing: Lower Patch type: Double path Effect type: Pitch block Upper input connector: Stereo to Stereo Lower input connector: Stereo to Stereo Routing: Upper Patch type: Double path Effect type: Chorus block Upper input connector: Stereo to Stereo Lower input connector: Stereo to Stereo Routing: Merge Patch type: Double path Effect type: Delay block Upper input connector: Stereo to Stereo Lower input connector: Stereo to Stereo Routing: Upper Patch type: Single path Effect type: Reverb block Upper input connector: Stereo to Stereo Lower input connector: Stereo to Stereo Routing: Upper Patch type: Single path Effect type: Output block Upper input connector: Stereo to Stereo Lower input connector: Stereo to Stereo Routing: Upper Patch type: Single path 30 Lexicon MPX 1 V1. 10 MIDI Implementation Details Rules In addition to the basic range limits that should be placed on the values of each field of the Audio Routing blocks, there are some rules which should be followed when making changes such as avoiding illegal configurations (audio path is broken, etc. ), avoiding redundant paths (parallel followed by a parallel, etc. ) and avoiding confusing configurations. The following guidelines are provided for editing Audio Routing blocks. The default signal path between the stereo inputs and outputs is a single path--six effects blocks connected in series. The routing options allow the user to split this path in two, creating upper and lower paths. Once the path has been split, it can be merged back into a single path again. In order to minimize redundant configurations and to keep the user from making unusable routing maps (blocks with nothing connected to the inputs, etc. ), the number of options available is conditional, depending on how blocks in front (on the input side) of the selected block are configured. Upper Lower Split The inputs and outputs of an upper block are on the upper path. Blocks can only be assigned to the lower path if the path has been previously split. (The lower path output signal is an exact copy of the upper path signal. ) A split block can only be used in a single path. (The lower path output signal is an exact copy of the upper path signal. ) Parallel blocks can only be used in a double path, following either an upper or lower block. It changes a double path into a single path. Parallel Merge NOTES: 1. (This is determined by the state of the path prior to the output block. If it has been split, then the output block is automatically set to merge. As stated previously, it is possible to create configurations in which the path is split and merged more than once. Merge and parallel blocks imply more processing overhead, since they require mixing of two pairs of signals. [. . . ] Treb Disp Units Use "reverb_freq_strings" Bassrt Disp Units Display `X' followed by "bass_rt_strings" 55 0x29 0x2a 0x2b 0x2c 0x2d 0x2e 0x2f 0x30 0x31 0x32 0x33 0x34 0x35 0x36 0x37 MPX 1 V1. 10 MIDI Implementation Details 0x38 0x39 0x3a 0x3b 0x3c 0x3d 0x3e 0x3f Crossover Disp Units Midrt Disp Units Lexicon 0x40 0x41 0x42 0x43 0x44 0x45 0x46 0x47 0x48 0x49 0x4a 0x4b 0x80 0x81 0x82 0x83 0x84 0x85 0x86 0x87 0x88 0x89 Use "reverb_freq_strings" offsetting the parameter value by 12. If reverb algorithm is 1 or 5 use the "chamber_decay_strings", if 2 then use "hall_decay_strings", if 3 use "plate_decay_strings" Percent50 Disp Units Multiply value by 2 and display in decimal followed by `%'. Msec Disp Units Display in decimal (optionally follow with "ms") Spread Disp Units Display in decimal. Note that if "Link" is turned on, the value is scaled Shape Disp Units Display in decimal Slope Disp Units If the value is < 16, a minus sign is displayed followed by 16 minus the value in decimal. [. . . ]