UMR: DIP Switch Settings

Below are descriptions of the DIP switch settings for the UMR:

• DIP switch SW2 specifies the MIDI channel to which the UMR responds.
• DIP switch SW1 controls other parameters relating to the installation.

For most users, only the SW2 channel setting is of interest. Explicit SW1 settings are provided for each keyboard model in the installation notes.

Detailed SW1 descriptions are provided below for users attempting to install the UMR to an undocumented keyboard model. For more information about how SW1 settings relate to the host keyboard, see the keyboard matrix article.

All DIP switch selections become active at power-up.

Use DIP Switch SW2 to select the incoming MIDI channel.

MIDI Channel	Switch 1	Switch 2	Switch 3	Switch 4
1	-	-	-	-
2	-	-	-	on
3	-	-	on	-
4	-	-	on	on
5	-	on	-	-
6	-	on	-	on
7	-	on	on	-
8	-	on	on	on
9	on	-	-	-
10	on	-	-	on
11	on	-	on	-
12	on	-	on	on
13	on	on	-	-
14	on	on	-	on
15	on	on	on	-
16	on	on	on	on

'-' = off

Use DIP Switch SW1 positions 1-4 to select the MIDI note for the first key on the host keyboard.

First MIDI Note	Switch 1	Switch 2	Switch 3	Switch 4
36 (C2)	-	-	-	-
37 (C#2)	-	-	-	on
38 (D2)	-	-	on	-
39 (D#2)	-	-	on	on
40 (E2)	-	on	-	-
41 (F2)	-	on	-	on
42 (F#2)	-	on	on	-
43 (G2)	-	on	on	on
44 (G#2)	on	-	-	-
45 (A2)	on	-	-	on
46 (A#2)	on	-	on	-
47 (B2)	on	-	on	on
48 (C3)	on	on	-	-
49 (C#3)	on	on	-	on
50 (D3)	on	on	on	-
51 (D#3)	on	on	on	on

'-' = off

Use DIP Switch SW1 positions 5-7 to specify the number of data lines in use.

Number of Data Lines	Switch 5	Switch 6	Switch 7
1	-	-	-
2	-	-	on
3	-	on	-
4	-	on	on
5	on	-	-
6	on	-	on
7	on	on	-
8	on	on	on

'-' = off

The UMR firmware can respond to the host keyboard's "select" signals differently, depending on the speed of the key scan.

Set DIP Switch SW1 position 8 to "off" for older, slower keyboards.

Set DIP Switch SW1 position 8 to "on" for more recent, faster keyboards.

Selection becomes active at power-up.