VLinn LM-1 Manuale utente

LM-1 DRUMS

www.alyjameslab.com

USER MANUAL 1.0

Aly James

TABLE OF CONTENTS

INTRODUCTION............................................................................................................................. 3

INSTALLATION............................................................................................................................... 6

CONTROL PANELS ......................................................................................................................... 9

THE AM6070 DAC.........................................................................................................................11

SAMPLE TUNING..........................................................................................................................15

THE HIHAT CASE...........................................................................................................................18

MAIN PANEL................................................................................................................................19

CEM FILTERS ................................................................................................................................19

SETTINGS.....................................................................................................................................22

EPROM LOADING.........................................................................................................................24

PRESETS IMPORT / EXPORT...........................................................................................................27

MIDI AUTOMATION......................................................................................................................28

LM-1 SEQUENCER ........................................................................................................................29

HIDDEN SECRETS..........................................................................................................................31

LINKS...........................................................................................................................................32

DISCLAIMER & LICENCE AGREEMENT ............................................................................................33

INTRODUCTION

My name is Aly James;

French steam funky musician, composer and creator of strange musical DIY

devices and software.

I was planning for a long time to make an accurate Linn LM-1 VST dedicating

to the 1st Sample Based Drum Machine in History, mainly because I have never

been happy with packs of samples coming from different recording chains,

lacks of control over the pitch and all that makes the unique funky sound of

that legendary drum computer made by Roger Linn.

The Linn was THE killer drum machine in town back in the 80’s; it was also the first that include real

drum samples!

The Linn LM-1 Drum Computerwas created by Roger Linn. He used samples of acousticdrum sounds

recorded on the fly with some basic hardware he made at that time. The fact that they were

recorded raw with a custom made ADC, ignoring the basis of digital recording makes them cut better

in a mix than anything available at the time, they sounded so great that they become analternative

to the analog drum sounds of the 80's drum machines.. To this day the unique sound of the LM-1 is

highly regarded and only using samples of an LM-1 output cannot reproduce the wide range of

sounds this machine can produce. The DAC in use in here and the whole circuitry stands next to the

samples characters in that unique sounding team.

The LM-1 is an historical piece of gear that has a place in the sound of the 80's era.

Only around 500 of these things are out there so don't counton finding aworking one easily or for

cheap. It has been used by majoracts like:

Prince, Phil Collins, Thompson Twins, StevieWonder, Gary Numan, Depeche Mode, The Human

League, Jean-MichelJarre, Vangelis, John Carpenter, Todd Rundgren,TheArt of Noise etc... The

Machine was made by a musician for musicians and I tried to stick to that standard. So as there were

no accurate VSTfor that legend out there...

I had to make the VLINN!

________________________________________________________________________________

Personally, I grow up listening alot of Funk Music and especially the Minneapolis Funk scene,The

LM-1, Linndrum & DMX Drum Machines sound were preeminent and were ahuge part of that

particularsound. The fact that the LM-1 had multiple outputs screamed for experimentation and it

wasn’t uncommon to send each drumsounds to fx units or guitarpedals. The usage of algorithmic

gatedreverbsof that era was also part of the sound (think AMS RMX16 or Eventide harmonizer).

Most of the rare LM-1 machines were usually modified to suit the artist needs, increasing pitch

range, adding external triggers & changing stock EPROMS samples wasn’t uncommon. Still, the

characteristic stock sounds of the Bass, Snare, Claps, Rim shotand Hihat were always present.

The coolest thing was that each and every sounds of the LM-1 were tunable and as they were stored

in EPROMS chips, they can be replaced by other EPROMS with different orcustommade samples.

The Linn LM-1 was controlled by a Z80 processorand featured a built in sequencer. An urban legend

goes on fora long time about the LM-1 having a special groove and even a kind of secret

randomization builtin…This is plain false, as Roger Linn himself have recently stated and debunk the

myth, the LM-1 groove only comes from the low resolution of its sequencer, which is, 48PPQN (see

LM-1 Sequencersection)

This emulation is based on reverse engineering and old datasheets; it uses a C++ custom corewith

modeled AM6070 DAC, Oscillators, counters, OPAMPS &Filters.

The product has been assembled through theSYNTHEDITframework using thevery last version,

Mostly custom C++ coding and some third party licensed codewhere nothing fancy wereneeded. It

will be ported to OSX at some point in the future.

________________________________________________________________________________

Thanks to all the nice people that started to use VLINN and support my projects and to proud

owners of original Linn LM-1 Units who havesent me some recordings to make tests.

A special thanks to Roger Linn (LM-1 Creator) & Paul J Whites (Electrongate.com).

Full Credits & Thanks can be accessed on the VLINN GUI panel.

Mainly,

VLINN can be triggered via MIDI following mostly the GM MIDI Drums mapping.

Each trigger will engage a binary counter that will run at the speed of an oscillator which

pitches is fixed by the tune knob setting. Byte after byte, the EPROM content will be read

and the output will be decoded by the emulated AM6070 DAC. The output of the DAC is

amplified by an OPAMP and will be filtered in some way differently depending on the voice.

The counter will read all the EPROM content even if you release the key before the end.

A main mixer is used to set the volume of each voice before it hits the output stage.

The Linn LM-1 featured panning switches that are not needed anymore because we have

separate outputs that will be mixed and panned inside a DAW; hence there is no panning in

VLINN VST.

Each voice has its own tune knob that will control the speed of the EPROM data reading, the

range available is 978 Hz – 44092 Hz which correspond to a real mod you can apply to the

Linn LM-1 to increase the pitch range, stock was 12048 Hz – 30303 Hz). (See Sample Tuning.)

Seven of the stock LM-1 EPROMS can be replaced by external compatible content and an

additional voice can also be used. This opens up to Linndrum sounds (often called LM-2),

DMX, Drumtracks etc… and even your own created EPROM content (See EPROM Loading.)

Basic MIDI implementation:

MIDI IN:

VLINN can receive any MIDI CH as main source for triggers.

It can be triggered with a standard MIDI Keyboard/Pads or even a MIDI Drum Kit.

The mapping follows almost the same mapping as GM MIDI Standard.

Notethat most DAW can convert incoming MIDI notes to another if needed and that most of the

hardwareMIDI pads can be assigned to any MIDI notes.

Bass – MIDI notes 35, 36

Conga High – MIDI note 49

Snare – MIDI notes 38, 40

Conga Low – MIDI note 50

Hihat Closed – MIDI notes 42, 44

Claps – MIDI note 39

Hihat Open – MIDI note 46

RimShot – MIDI note 37

Cowbell – MIDI note 56

Tambourine – MIDI note 54

Tom High – MIDI notes 41, 43, 45

Cabasa – MIDI note 51

Tom Low – MIDI notes 47, 48

Additional Custom Voice – MIDI note ??

INSTALLATION

COMPATIBILITY

VLINN isa Windows 32Bit VST Instrument foruse with MIDI capable DAWs.

RUN on 32/64 Bit Systems.

If you want to use it with a 64bit DAW you can use JBridge or internal DAW Bridge.

INSTALL VST

1.Decompress the downloaded archive file

2. Copy the entire Folder VLINN to your VSTPLUGINS folder

3. Load it in your DAW

INSTALL STANDALONE

1.Decompress the downloaded archive file

2. Copy the entire Folder VLINN_STANDALONE where you want

3. Simply RUN VLINN.exe

State of VLINN current features

WIN 32 VST runs on 32/64Bit Systems and it is multicore compatible.

HIGH QUALITY GUI

(Different panels for controls etc...)

INSTANT UPDATE FOR ALL CONTROLS

FULL MIDI AUTOMATION

With midi learn (rightclickto assign MIDI)

AM6070 MODELED REAL TIME DAC DECODING

Following the exact datasheet decodetable for 8bit companded incoming DATA.

HIHAT DATA LOOPING & VCA

The LM-1 Hihat circuitry was pretty unique, the hihatproms were read constantly in a loop while

only a VCA was triggered, forclosed hihatthe circuitry had the ability to discharge the current

through an additional way based on the decay pot setting. This basically makes the hihatsounding

different on every hit.

CEM 3320 Filters

Unlike the very first produced LM-1, some Voices with Bassfrequency contentwere filtered to

minimize the remaining8bitnoise, using a VCF configured as a 4 poles low pass filterwith no

resonance. The CV frequency of the VCF was shaped by the circuitry in a way that lets the transients

pass through relatively unfiltered. The VLINN lets you finetune the CV pulse or completely bypass

the filter, this is useful when a voice is tuned very low orif you want to replace a "Bass" slot with

another EPROM that doesn't require filtering.

SEPARATE PITCH TUNING

Thisis one of the coolestfeatures of the LM-1, letting you tune any voice to a particularfrequency

for a wide range of sounds.

The PROMS data were read one byte at the time by a counterwhich speed was controlled by a

relatively stable oscillator, the counterreading speed could then be affected by the externaltuning

pots in a limited range, +or - 1 Octave.

This tuning range can be tweaked and the VLINN provides a useful wide range of pitch from 1000

Hz to 44100 Hz and anything in between.

(Stock setting range was 12048 – 30303 Hz. See Sample Tuning.)

SEPARATE OUTPUTS

The LM-1 features separate outputs forevery voices, so as the VLINN.

You can choose from ALL to 1 Stereo Channel orSeparate Stereo Channels for each voice.

VELOCITY CONTROL

You can limityourselftoonly2velocity levels oruse the full range of MIDI velocityforconvenience.

GUI & AUTOMATION

The GUI features the original triggerbuttons for kick listening and controls over every aspectof the

Drum Machine, most of the parameters like volume and pitch knobs can be MIDI learned and

controlled by an external MIDI Hardware.

LOADING EXTERNAL EPROMS DATA

The VLINN provides the ability toreplace some voices with external compatible 8bit companded

EPROM data, which opens up the machine to LINNDRUM (LM-2) samples, LINN 9000, DMX, DX,

DRUMTRACKS etc... Even load your own custom made. You can switch between customloaded and

stock EPROMS on the fly.

VLINN supports the following type and size EPROMS binaries (.bin)

2716(2048_Bytes) 2K

2732(4096_Bytes) 4K

2764(8192_Bytes) 8K

27128(16384_Bytes) 16K

27256(32768_Bytes) 32K

LOAD & SAVE FULL PATCH & BANKS in FXB/FXP

CONTROL PANELS

Overview

VLINN GUI INTERFACE is pretty straight forward; it stores the different parameters on different

panels.

The main sliders on the mixer set the volume for each voice.

The Tuning knobs set the pitch (sample rate) for each voice; you can also type in the precise pitch in

Hz manually by clicking on the number itself.

The Hihat horizontal slider to the left bottom of the GUI sets the decay value for the closed hihat

circuitry.

You can also trigger a voice by clicking on the corresponding drum pad, some of them have two

velocity values available some not, and hence the doublepads on Bass, Snare, Hihat, Tamb & Cabasa.

Toms & Congas pads trigger either the high or low voice.

Note that the high Tom or Conga can be tuned lower than the low corresponding voice; this is

basically just a name to differentiate the two voices.

Once a voice is triggered a red LED indicates the status.

These are the main panels than can be reached by the panel buttons to the left:

PANELS:

MAIN: Access to the Mixer Board.

CEMS: Access to the filters settings of the CEM 3320 chip for BASS, TOMS & CONGAS voices.

PROM Access to the EPROMS configuration panel.

SETS Access to settings like velocity handling and voice output routing, also displays the binary

counters for each EPROM in real-time.

One is blank for future updates and extended features…

Indice

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