This page will contain all of the information about the Coresound synth
link to forum topic: http://www.midibox.org/forum/index.php?topic=8150.0
Coresound is a digital synthesiser module based on the midibox platform.
todo: add more info
This version uses a lfo, cc and env code from mb_sid v1.7
the dco is a wavetable oscillator based on the Wiard Wavecity ROM
From v0.2 the modulation/control/cs will be seperated from the actual sound generation
The data exchangement method is not decided yet, MBNET seems the best choice right now
see this forum topic for more information: http://www.midibox.org/forum/index.php?topic=8328.0
The sound unit registers will be refreshed each time the control routine is executed (f = 1kHz)
The control unit will be based on the midibox sid engine
but will be adapted to control the sound unit parameters.
The first tests will be done with the wavetable dco from v0.1,
after this works alternate dco implementations will be tried
Register specification:
My experiences with setting up a MBNET client:
;; MBNET specific definitions (ping reply information - don't touch this!) #define MBNET_CONST_PROTOCOL_V 1 #define MBNET_CONST_TYPE_C0 'S' #define MBNET_CONST_TYPE_C1 'I' #define MBNET_CONST_TYPE_C2 'D' #define MBNET_CONST_TYPE_C3 ' ' #define MBNET_CONST_TYPE_VERSION 1 #define MBNET_CONST_TYPE_SUBVERSION 4685
into:
#define MBNET_CONST_PROTOCOL_V 1 #define MBNET_CONST_TYPE_C0 'C' #define MBNET_CONST_TYPE_C1 'R' #define MBNET_CONST_TYPE_C2 'S' #define MBNET_CONST_TYPE_C3 'D' #define MBNET_CONST_TYPE_VERSION 0 #define MBNET_CONST_TYPE_SUBVERSION 2
MBNET_BASE EQU 0x600 ; used for SET_BSR MBNET_STATE EQU 0x600 MBNET_RX_BUFFER_PTR_L EQU 0x601 MBNET_RX_BUFFER_PTR_H EQU 0x602 MBNET_MY_ID EQU 0x603 MBNET_MASTER_ID EQU 0x604 MBNET_SLAVE_ID EQU 0x605 MBNET_TOS EQU 0x606 MBNET_EID_L EQU 0x607 MBNET_EID_H EQU 0x608 MBNET_NODE_AVAIL EQU 0x609 MBNET_NODE_INCOMPATIBLE EQU 0x60a MBNET_TIMEOUT_CTR_L EQU 0x60b MBNET_TIMEOUT_CTR_H EQU 0x60c MBNET_LOOP_CTR EQU 0x60d MBNET_RETRY_WAIT_CTR EQU 0x60e MBNET_RETRY_NODE EQU 0x60f MBNET_RETRY_NODE_CTR_BEGIN EQU 0x610 ; ..0x617 MBNET_NODE_INFO_BEGIN EQU 0x620 ; ..0x65f ; (8*8 bytes)
The hardware of the first version consists of a standard core board and a DAC module with a anti-aliasing filter
connection to core:
coresound pin | core pin | pic pin nr |
---|---|---|
1 | ground | - |
2 | J15:D7 | 40 |
3 | J15:D6 | 39 |
4 | J15:D5 | 38 |
5 | J15:D4 | 37 |
6 | J15:D3 | 36 |
7 | J15:D2 | 35 |
8 | J15:D1 | 34 |
9 | J15:D0 | 33 |
10 | J14 | - |
11 | +5v | - |
The final version will use two pics, more info will follow
Not available yet