MIDI and the organ project - Revision history

Admin at 23:02, 21 March 2017

2017-03-21T23:02:31Z

← Older revision		Revision as of 16:02, 21 March 2017
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	*[[Spectra]]		*[[Spectra]]
	*[[Other stuff]]		*[[Other stuff]]


	====MIDI and the organ====		====MIDI and the organ====

Admin at 22:31, 16 March 2011

2011-03-16T22:31:19Z

← Older revision		Revision as of 15:31, 16 March 2011
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	===Stuff from the old Google Notebook stuff===		===Stuff from the old Google Notebook stuff===
	~~_Pin layout_~~		====Pin layout====
	*8 data (D7-D0)		*8 data (D7-D0)
	*8 address (A7-A0)		*8 address (A7-A0)
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	2 D0---------------Data--------D7 /A3------------/A7		2 D0---------------Data--------D7 /A3------------/A7

	~~_Alternative~~ Input ~~Detection_~~		====Alternative Input Detection====
	Using 40pin AVR, we can use a lot of digital inputs directly to the AVR. We have to use some for normal things. On the slave:		Using 40pin AVR, we can use a lot of digital inputs directly to the AVR. We have to use some for normal things. On the slave:
	*Vcc		*Vcc

Admin at 22:30, 16 March 2011

2011-03-16T22:30:45Z

← Older revision		Revision as of 15:30, 16 March 2011
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	*1x? 74HCT154 for 1 to 16 decoder (0.80, 24 pin dip)		*1x? 74HCT154 for 1 to 16 decoder (0.80, 24 pin dip)
	*1x ATMega164P-20P for AVR controller, 20MHz, (4.82, 40 pin dip)		*1x ATMega164P-20P for AVR controller, 20MHz, (4.82, 40 pin dip)


			===Stuff from the old Google Notebook stuff===
			_Pin layout_
			*8 data (D7-D0)
			*8 address (A7-A0)
			*5 inverted address (/A7-/A3)
			*1 power (V)
			*1 ground (G)
			*1 card select (S)
			*1 R/W (R)
			*1 Presence detect (P)
			1 2 3 4 5 6 7 8 9 10 11 12 13
			1 V S R P G A0-------A2 A3--------------A7
			2 D0---------------Data--------D7 /A3------------/A7

			_Alternative Input Detection_
			Using 40pin AVR, we can use a lot of digital inputs directly to the AVR. We have to use some for normal things. On the slave:
			*Vcc
			*Gnd
			*Reset
			*XTAL1
			*XTAL2
			*UART RX (all tied to CNTR TX)
			*UART TX (all tied to MIDI out + CNTR RX)
			*RTS
			*CTS
			Thats 9 pins, so 31 are left for digital inputs for keys/stops (per controller).

			On the master (CNTR):
			*Vcc
			*Gnd
			*Reset
			*XTAL1
			*XTAL2
			*UART1 RX (tied to all Slave TXs)
			*UART1 TX (tied to all Slave RXs)
			*MOSI
			*MISO
			*SCK
			*UART2 RX (from host)
			*UART2 TX (to host)
			Thats 12 pins, so 28 are left for RTS/CTS controls for each slave. That means a max of 14 slaves. However, if we use some ADCs on the master for analog controls, we might lose some possible slaves. Or, the analog controls could be fed to a slave controller, or a dedicated controller.

			If we have what you might hope would be a max config:
			*5 manuals@61 keys is 2 slaves/manual, or 10 max
			*1 pedalboard@30/32 keys is 1 slaves/pedalboard, or 1 max (Note: 32 wouldn't fit...)
			*1 set of stops@60 stops or so is 2 slaves/stop set, or 2 max
			That gives us about 13 boards. Maybe the last slave could be used for more stops, or analog controls.

96.42.235.80 at 00:14, 7 April 2009

2009-04-07T00:14:09Z

← Older revision		Revision as of 17:14, 6 April 2009
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	*[[Pipe creation workflow]]		*[[Pipe creation workflow]]
	*[[Theoretical Pipe Variations]]		*[[Theoretical Pipe Variations]]
			*[[Spectra]]
			*[[Other stuff]]

	====MIDI and the organ====		====MIDI and the organ====

129.42.161.36 at 21:53, 30 March 2009

2009-03-30T21:53:12Z

← Older revision		Revision as of 14:53, 30 March 2009
Line 3:		Line 3:

	*[[Pipe creation workflow]]		*[[Pipe creation workflow]]
			*[[Theoretical Pipe Variations]]

	====MIDI and the organ====		====MIDI and the organ====

129.42.161.36 at 19:49, 3 March 2009

2009-03-03T19:49:57Z

← Older revision		Revision as of 12:49, 3 March 2009
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	*[http://sessrumnir.net/organs/trunk/ SVN trunk for organ code]		*[http://sessrumnir.net/organs/trunk/ SVN trunk for organ code]
	*[http://www.die-orgelseite.de/pfeifenarten_e.htm Interesting site for pipe shapes and sounds]		*[http://www.die-orgelseite.de/pfeifenarten_e.htm Interesting site for pipe shapes and sounds]

			*[[Pipe creation workflow]]

	====MIDI and the organ====		====MIDI and the organ====

129.42.161.36 at 17:58, 2 March 2009

2009-03-02T17:58:25Z

← Older revision		Revision as of 10:58, 2 March 2009
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	*[http://sessrumnir.net/organs/trunk/ SVN trunk for organ code]		*[http://sessrumnir.net/organs/trunk/ SVN trunk for organ code]
			*[http://www.die-orgelseite.de/pfeifenarten_e.htm Interesting site for pipe shapes and sounds]

	====MIDI and the organ====		====MIDI and the organ====

Admin at 22:26, 27 February 2009

2009-02-27T22:26:37Z

← Older revision		Revision as of 15:26, 27 February 2009
Line 1:		Line 1:
			*[http://sessrumnir.net/organs/trunk/ SVN trunk for organ code]


			====MIDI and the organ====
	MIDI standard is out there. Also good is the RTP-MIDI RFC, for putting MIDI data into a stream and whatnot.		MIDI standard is out there. Also good is the RTP-MIDI RFC, for putting MIDI data into a stream and whatnot.

96.42.70.86: /* Chips to use */

2009-02-24T02:53:42Z

Chips to use

← Older revision		Revision as of 19:53, 23 February 2009
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	===Chips to use===		===Chips to use===
	*16x? ~~74HCT541~~ for the octal tri-state buffers (0.40, 20 pin dip)		*16x? 74HCT540 for the octal tri-state buffers, inverting (0.54, 20 pin dip)
	*1x? 74HCT138 for 1 to 8 decoder (0.40, 16 pin dip)		*1x? 74HCT138 for 1 to 8 decoder (0.40, 16 pin dip)
	*1x? 74HCT154 for 1 to 16 decoder (0.80, 24 pin dip)		*1x? 74HCT154 for 1 to 16 decoder (0.80, 24 pin dip)
	*1x ATMega164P-20P for AVR controller, 20MHz, (4.82, 40 pin dip)		*1x ATMega164P-20P for AVR controller, 20MHz, (4.82, 40 pin dip)

129.42.161.36 at 19:34, 23 February 2009

2009-02-23T19:34:56Z

← Older revision		Revision as of 12:34, 23 February 2009
Line 50:		Line 50:

	Not sure what the latency of the serial to USB conversion is in FTDI, but it could be as bad as a single byte in a single USB message.... Anyway, we want to build a buffer of bytes that need to get send over each sample time, with the RTP-MIDI spec used to make it a stream type thing. This means: packet length, "timestamp", first MIDI event, relative timestamps (should all be zero), subsequent MIDI events.		Not sure what the latency of the serial to USB conversion is in FTDI, but it could be as bad as a single byte in a single USB message.... Anyway, we want to build a buffer of bytes that need to get send over each sample time, with the RTP-MIDI spec used to make it a stream type thing. This means: packet length, "timestamp", first MIDI event, relative timestamps (should all be zero), subsequent MIDI events.

			===Chips to use===
			*16x? 74HCT541 for the octal tri-state buffers (0.40, 20 pin dip)
			*1x? 74HCT138 for 1 to 8 decoder (0.40, 16 pin dip)
			*1x? 74HCT154 for 1 to 16 decoder (0.80, 24 pin dip)
			*1x ATMega164P-20P for AVR controller, 20MHz, (4.82, 40 pin dip)