User manual LEXICON PCM 60

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Manual abstract: user guide LEXICON PCM 60

Detailed instructions for use are in the User's Guide.

[. . . ] 4 Single Effect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Bulk Chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] The 435-byte record is of the following format: Bytes 1-2 3 4 5-16 17-25 26-n (n+1)-435 Description Count of valid bytes (n) (ls byte first) Algorithm Id Position in Edit Matrix Register Name ­ space filled ADJUST Knob Name ­ space filled Bitpacked Effect Control Data Zero Fill Effect Register Header Information Algorithm ID PCM 60 software includes ten algorithms. The numbering and naming is as follows: Byte Value 00 01 02 03 04 05 06 07 08 09 Algorithm Name Plate Chamber Infinite Inverse Concert Hall M-Band+Rvb Glide>Hall Chorus+Rvb Res1>Plate Res2>Plate Position In Edit Matrix Position in the Edit Matrix refers to the row and slot numbers given in the PCM 60 User Guide for each algorithm, the same as the displayed row. slot number. The format of this Edit Matrix Position is: Bit rrrrssss Meaning rrrr = row (0x0 through 0xf) ssss = slot (0x0 through 0xf) Register Name The Register Name is the text name that appears when the register is selected from any of the Program, Register, or Card banks. This text is always 12 bytes of ASCII characters with no NULL (0x00) characters, padded with spaces (0x20) if needed to fill out the 12 bytes. ADJUST Knob Name The ADJUST Knob Name is the text name that appears when a register has been loaded, at least one parameter has been patched to the ADJUST knob, and the ADJUST knob is turned. This text is always 9 bytes of ASCII characters with no NULL (0x00) characters, padded with spaces (0x20) if needed to fill out the 12 bytes. Bitpacked Effect Control Data The Bitpacked Effect Control Data contains all of the parameter values and patching information that make up the effect. Details of this data make up the entire remainder of this document. 17 PCM 60 MIDI Implementation Details Lexicon Bitpacking General Bitpacking Method All PCM 60 effect control data fields are words from 1-16 bits in length utilizing the minimum number of bits necessary to represent the full range of the field. As an example, let us say we have fields a, b, and c which are, respectively, 5, 14, and 9 bits wide. aaaaa bbbbbbbbbbbbbb ccccccccc . . . . . . . . first field bits second field bits third field bits unused bits Our bitpack bytes would initially be all zeroes and the first several bytes would look like this: Byte 1 . . . . . . . . Byte 6 . . . . . . . . The first field is loaded right justified into the first byte. Byte 1 . . . aaaaa Byte 2 . . . . . . . . Byte 6 . . . . . . . . The second field's 3 least significant bits are loaded into the remaining 3 bits of Byte 1. . . Byte 1 bbbaaaaa Byte 2 . . . . . . . . Byte 6 . . . . . . . . . . . the next (middle) eight bits are loaded into Byte 2. . . Byte 1 bbbaaaaa Byte 2 bbbbbbbb Byte 3 . . . . . . . . The Patching Information consists of 10 variable length blocks, one for each of the 10 patches in the Patch row. Each block can be as small as 1 bit or as large as 204 bits (25 bytes, 4 bits). A Patch Information Block always begins with a 1-bit field which indicates whether there is ANY patch information for that patch. 0 means that there is no patch in that slot, 1 means that the data to follow is to be interpreted as patch information. Therefore, an effect register which contains NO patches will have a sequence of 10 zero-bits immediately after the Patchable Parameter Information in the bitpack parameter data, each zero signifying an unassigned patch. When the Patch Validity Value bit is a 1, it is immediately followed by the Patch Block Header with the following format: Bits 7 1 8 4 Contents Patch Source ID Value Destination Patchable Parameter List ID Value Destination Patchable Parameter Number Value Count of Patch Points Value 20 Lexicon PCM 60 MIDI Implementation Details If the Count of Patch Points is 0, the Patch Information Block will end with the above information. For values 1-8, the patch's information block will be filled out with the following sequence repeated for as many points as are defined. Bits 7 n Contents Patch Point Value (0 -27) Destination Patchable Parameter Value for that patch point For the second field, the "n" bit count is anywhere from 1-16. It is the number of bits needed to represent any value for that patchable parameter. For example, refer to the partial list of Patchable Parameter Information in the previous section. If a patch destination parameter was Controls Mix, the number of bits for the Destination Patchable Parameter Value would be 7, and the range of values for that parameter would be 0-100. For every patch point there would be 7 bits to hold the Patch Point Value, and 7 bits to hold the Destination Parameter Value. [. . . ] Example: With the Plate reverb loaded (from Plate, Chorus+Rvb, Res1>Plate, or Res2>Plate) and RvbDesign Link is assigned to On. RvbDesign Size parameter has a value of 0 (which is 4. 0 meters) and RvbTime Mid Rt is has a value of 63 which looks up as 65393 milliseconds. A few more brief examples: Plate RvbDesign Size value 90 (49. 0 meters) RvbTime Mid Rt value 43 (2598 msecs) (((90 + 16)/16) * 2598)/10 = 1558 msecs Display 1. 60 seconds RvbDesign Size value 269 (138. 5 meters) RvbTime Mid Rt value 62 (32441 msecs) (((269 + 16)/16) * 32441)/10 = 55149 msecs Display 55. 1 seconds Concert Hall Range Decode 17 The value is used as a lookup to the following valid filter crossover assignments. 30, 60, 90, 120, 151, 181, 212, 243, 273, 336, 398, 461, 525, 589, 654, 818, 986, 1158, 1333, 1513, 1697, 1886, 2079, 2278, 2481, 2691, 2906, 3127, 3355, 3591, 3833, 4084, 4343, 461, 4888, 5177, 5476, 5788, 6113, 6453, 6808, 7181, 7573, 7986, 8423, 8886, 9379, 9906, 10472, 11084, 11748, 12476, 13281, 14181, 15201, 16379, 17772, 19476, 21674, 24772, Off Range Decode 18 The value is used as a lookup to the following valid filter crossover assignments. 525, 589, 654, 818, 986, 1158, 1333, 1513, 1697, 1886, 2079, 2278, 2481, 2691, 2906, 3127, 3355, 3591, 3833, 4084, 4343, 4611, 4888, 5177, 5476, 5788, 6113, 6453, 6808, 7181, 7573, 7986, 8423, 8886, 9379, 9906, 10472, 11084, 11748, 12476, 13281, 14181, 15201, 16379, 17772, 19476, 21674, 24772, Off Range Decode 19 Rvb Time Inverse algorithm slopes. The parameter is always range 32 and the values 0-32 translate to the display -64% through 0% to +64% in increments of 4%. [. . . ]

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