Tubbutec SH-1oh1 User manual

Tubbutec SH-1oh1
Midi retrofit and feature extension for Roland SH-101
User Manual v1.1
http://tubbutec.de
1

Contents
Contents 2
1 SH-1oh1 4
2 Accent 4
3 Improved sequencer 5
3.1 Newfeatures .......................... 5
3.2 Recording a sequence . . . . . . . . . . . . . . . . . . . . . . 5
3.3 Playingasequence ....................... 6
3.3.1 Playing directions . . . . . . . . . . . . . . . . . . . . 6
3.3.2 Shiftsequence...................... 6
3.4 Continue recording a sequence . . . . . . . . . . . . . . . . . 6
3.5 Switchsequence......................... 7
3.5.1 Select sequence to play . . . . . . . . . . . . . . . . . 7
3.5.2 Change playing sequence at the end of the current one 7
3.5.3 Change playing sequence instantly . . . . . . . . . . 7
3.6 Record and play a song . . . . . . . . . . . . . . . . . . . . . 7
4 Additional filter ADSR envelope 8
5 Additional filter LFO 8
6 Arpeggiator, sequencer and random-LFO clocks 9
6.1 MIDI clock dividers . . . . . . . . . . . . . . . . . . . . . . . 10
6.2 ARP, SEQ and RANDOM clock divider . . . . . . . . . . . 11
6.3 Sensitivity............................ 11
7 Improved arpeggiator 12
8 Extended pitch range 12
2

CONTENTS 3
9 MIDI 13
9.1 MIDIin ............................. 13
9.2 MIDIout ............................ 13
9.2.1 MIDI out as played . . . . . . . . . . . . . . . . . . . 14
9.2.2 MIDI out as sounds . . . . . . . . . . . . . . . . . . . 14
9.3 MIDIController......................... 14
9.4 Saving MIDI parameters . . . . . . . . . . . . . . . . . . . . 15
9.5 Velocity mapping . . . . . . . . . . . . . . . . . . . . . . . . 16
9.5.1 None........................... 16
9.5.2 Cutoff .......................... 16
9.5.3 Volume accent amount . . . . . . . . . . . . . . . . . 16
9.5.4 Filter accent amount . . . . . . . . . . . . . . . . . . 16
9.5.5 Accentswitch...................... 16
9.5.6 Attack, decay, sustain or release . . . . . . . . . . . . 17
9.6 MIDImerger .......................... 17
9.7 Control SH-101 buttons . . . . . . . . . . . . . . . . . . . . 17
10 Config menu 18
10.1 Enter and exit the config menu . . . . . . . . . . . . . . . . 18
10.2 Using the config menu . . . . . . . . . . . . . . . . . . . . . 18
10.2.1 UPpage......................... 19
10.2.2 U&Dpage........................ 19
11 Appendix 20
11.1 MIDI controller chart . . . . . . . . . . . . . . . . . . . . . . 20
11.2Latency ............................. 21
11.3Thanks.............................. 22

42. ACCENT
1 SH-1oh1
The SH-1oh1 is a MIDI retrofit and feature extension for the Roland SH-
101 synthesizer. This manual only describes the features that differ from
those of the original SH-101. Great care has been taken to avoid altering
the original behavior of the synth while only adding features on top.
2 Accent
While the siblings of the SH-101 – the MC-202 and TB-303 – both have
this feature, which is important to many musical styles, it was unfortunately
lacking in the SH-101. . . until now!
The SH-1oh1 accent consists of an envelope with a fixed fast attack and a
decay adjustable between one millisecond and five seconds. It can be routed
to the VCA, filter or both while the amount can be adjusted individually.
The accent can be programmed in the sequencer or triggered via MIDI
velocity in various ways.
Accents give the SH-101 new possibilities in terms of expression and
variation.
See chapters ’Improved sequencer’ and ’MIDI’ for information on how

5
AMOUNT
TIME
Accent decay
Filter
VCA
CV
Amount
Switch
Amount
Switch
+
+
Figure 1: Accent flow chart
to trigger and program the accent.
3 Improved sequencer
3.1 New features
While the original SH-101 sequencer features one sequence with a maxi-
mum of 100 steps, the SH-1oh1 provides 32 sequences with 120 steps each.
Additionally the sequences can be chained to create a song. This can be
done live while an other song is playing. Each step of a sequence can be ei-
ther a rest or a note. Additional attributes can be assigned to notes: glide,
volume accent and filter accent. These attributes can also be combined.
Despite the vastly improved functionality, a user who has experience with
the original SH-101 can still use the sequencer as they did originally.
3.2 Recording a sequence
To record a sequence press the LOAD button. This will select the last
sequence used for editing. To select a different sequence for editing, instead
of pressing LOAD, press and hold LOAD and use the keyboard to select
a sequence. Each of the 32 keyboard keys has a sequence assigned to it.
Release the LOAD button to start recording.

63. IMPROVED SEQUENCER
You can now enter notes by using the keyboard.
Additional attributes can be added to a note by first pressing an assigned
button:
press HOLD for a glide, UP for volume accent and U&D for filter accent.
The LEDs above the buttons will light up to indicate the attribute’s state.
Press the same button again to remove the attribute. When you are fin-
ished selecting the attributes press a keyboard key to save the next step.
You will hear the note including the attributes (except glide). Press KEY
TRANSPOSE to enter a rest.
To delete the last step press DOWN. SH-1oh1 now plays the new final note
of the sequence.
The sequence is saved in the SH-1oh1 memory and will be available again
after power up even without a battery or external power supply.
3.3 Playing a sequence
To play a previously recorded sequence press PLAY.
3.3.1 Playing directions
You can use the UP, U&D and DOWN buttons to change the direction in
which the sequence is playing. Press DOWN and U&D simultaneously to
play the sequence in a random order.
3.3.2 Shift sequence
While a sequence is playing it can also be triggered manually and shifted
forward or backward. This is very useful when syncing the SH-1oh1 to an
external clock to adjust the start of a sequence. This function can also be
used as a performance tool, by shifting the sequence while it is playing to
create variation.
Press KEY TRANSPOSE and hold it. Now press UP to trigger the se-
quence one step forward, and press DOWN to trigger it one step backward.
3.4 Continue recording a sequence
If you want to continue recording a sequence, press LOAD while it is playing.
The sequence will stop playing and you can add or delete steps.

3.5. SWITCH SEQUENCE 7
3.5 Switch sequence
The SH-1oh1 features 32 different sequences with 120 steps each. Each of
the 32 keyboard keys has a sequence assigned to it.
3.5.1 Select sequence to play
Press and hold PLAY and press one of the keyboard keys to select a se-
quence.
If the sequencer was inactive it will begin playing the new sequence as soon
as you release the PLAY button.
3.5.2 Change playing sequence at the end of the current one
To change a sequence at the end of the one currently playing press and
hold PLAY and press the assigned keyboard key for the new sequence.
After releasing the PLAY button the current sequence will play until it
ends, followed by the new sequence, which will start from the beginning.
3.5.3 Change playing sequence instantly
While the sequencer is playing you can also change the sequence instantly
by pressing the corresponding keyboard key. The new sequence will not
start from the beginning, but instead will be synced to the playing one.
Synchronization is guaranteed as long as the two sequences have lengths
which are multiples of each other. For example 8 and 4 or 6 and 12, and so
on.
3.6 Record and play a song
You can chain up to 120 sequences to create a song. To record a song press
and hold PLAY and press the keyboard keys in the order you want the
sequences to be chained in. You can also select a single sequence multiple
times. If another song is currently playing, it will continue to play until you
release the PLAY button. After this, the currently playing sequence will

85. ADDITIONAL FILTER LFO
play until it ends and the first sequence of the new song begin.
4 Additional filter ADSR envelope
The SH-1oh1 features an additional ADSR envelope for the filter.
The envelope parameters - attack, decay, sustain, release and amount - can
be controlled via MIDI controller messages. See the MIDI controller chart
in the appendix.
The range of these parameters is very wide: from a few milliseconds on the
low end up to six seconds on the longest setting. The parameter control
law is logarithmic to ensure good control over the whole range.
The envelope does not retrigger if you play legato, in a similar fashion to
the ’GATE’ setting on the SH-101’s envelope selector.
AMOUNT
TIME
A D S R
Figure 2: ADSR overview
5 Additional filter LFO
The SH-1oh1 features an additional LFO for the filter which outputs a
triangular waveform. Its frequency can be adjusted from 0.12 Hz - 8

9
0 20 40 60 80 100 120
0
1
2
3
4
5
6
Midi value
Time [s]
Figure 3: Attack, Decay and Release times and their corresponding MIDI
controller values
kHz using a fine and coarse control. High LFO frequencies sound especially
interesting with a high resonance setting. The amount can also be adjusted.
See the MIDI controller chart for corresponding controller numbers.
6 Arpeggiator, sequencer and
random-LFO clocks
The ’RANDOM LFO’ mentioned in this paragraph refers to the ’RANDOM’
setting in the SH-101’s MODULATOR section. In other words, it’s one of
4 LFO types in the stock SH-101. It is not to be confused with additional

10 6. ARPEGGIATOR, SEQUENCER AND RANDOM-LFO CLOCKS
filter LFO described in chapter 5.
The SH-1oh1 sequencer, arpeggiator and ‘RANDOM’ LFO mode (and
only the RANDOM mode) can be clocked by multiple sources: the internal
LFO or external trigger input, MIDI clock, or MIDI notes.
Additionally, clock dividers are built in for these clock sources. This means
that you can, for example, have the ‘RANDOM’ LFO synced to the internal
LFO clock, while the arpeggiator is clocked at half its speed, the sequencer
is synced to MIDI 16th and the ‘random LFO triggered by an external
trigger signal.
There are four clock dividers: ARP / SEQ MIDI clock divider, ARP / SEQ
clock divider, RANDOM MIDI clock divider and RANDOM clock divider.
These are used depending on which sources are selected.
The figure below shows an overview of the general clock flow.
SELECTOR
/N
DIVIDER
/N
DIVIDER
/N
DIVIDER
/N
DIVIDER
MIDI
NOTE 0
MIDI
CLOCK
EXT CLOCK IN / LFO CLOCK
ARP and SEQ RANDOM LFO
SELECTOR
MIDI
NOTE 1
Figure 4: Arpeggiator, sequencer and random-LFO clock flow chart
The clock sources and divider settings can be made using the config
menu or via MIDI.
6.1 MIDI clock dividers
The table below shows the possible dividers for the MIDI clock and their
MIDI controller values. When changing the divider a special algorithm
ensures that the clock stays in sync.