Introduction to Tracking, Pixeling and Conversion to oldskool hardware:

Welcome to our world! We have created this guide and links page in response to a few questions regarding where to start. Especially if you want to try and make music for C64, Amiga or ultra small PC music. There is also a section for those who want to know more about the process of getting emulated content across to the "real" Hardware. This includes dealing with SIDs, MODs, PRG's and image files.

> 1. Tracking & Chip Tunes - Tools and Tips > 2. Pixeling - Tools and Tips > 3. Conversion to the "Real" Hardware

1. TRACKING & CHIP TUNES
(this will be extended / fixed over time. Hopefully this helps you get into it! CHIP MUSIC WOOO! -cTrix)

What is tracking?

The term "tracker" refers a specific style of notation entry which first appeared on the Amiga in the 80's. It is similar in some ways to the "events list" found in some MIDI programs but in a grid style format. Whilst it may look like a badly formatted spreadsheet on first glance, it is actually just a condensed list of notes, instruments and controllers such as volume, pitch bend, or panning. Pressing PLAY obviously reveals a lot more than pictures do..

Protracker on the Amiga 500. 2 notes are being triggered.. a low C and a middle C "C2A" and "C15" are simply setting the volume.	Ninja Tracker on the C64 Trk 1-3 list is referencing patts & playing them in order. Pattern 1 is a list of notes using a "harp" sound

The tracking phenomenon became THE way of scoring music and sharing tracks pre-internet days when we used to send 880k floppy's to each other via mail. Early BBS sites used to overflow with tracker based music. It is still used today by 1000's of users because of the ultra small file sizes, portability between programs and compatibility with oldskool hardware. Almost all "retro" computers (C64, Atari, Gameboy, Amiga...) all have freeware tracking software available for them and once you learn the tracking process - it all makes sense.

The "tracker formats" are very different to a WAV or MP3 but can be of similar quality, a fraction of the filesize and potentially allow the end user to open the file and look at its notation, instruments and sequence.

Unlike an MP3 file, which arrives as a "Mixdown", a tracker file (such as a MOD or IT) is mixed on-the-fly by the computer.

Surprisingly (but not for coders) this can actually result in a much lower CPU usage as an MP3 or MP4 files require huge amounts of complex maths to decompress them (not to mention patents..) Tracker samples are almost always uncompressed or lossless, so mixing 4 - 16 channels is nothing. Note "uncompressed" - aka. none of those wishy-washy compression artifacts of MP3 but often 10 - 20 times smaller...

Almost all tracker formats are open source and most composition software is free and open each others formats. Players like WINAMP can play almost all the tracker formats and players are available for almost every OS.


Tracking vs. MIDI

Some of you may be familiar with packages such as Cubase, Cakewalk, Logic, Reason or other packages which are largely reliant on storing just the MIDI or notation data. As you will know, you can't hand over your Reason file or Logic project to your friend and expect them to play the file back trouble free. They would require the same software with the same plug-ins in order to play back the file. Plus any associated audio files or sample libraries. You would usually do a "mixdown" and make it an MP3 or suchlike right? This is where tracking is different.

It is worth noting that the tracker formats are more suited to writing electronic music rather than orchestral scores. Artists such as The Prodigy, Rogue Traders, KLF, BT and many more all started on early tracker-based programs.


The Approach

A Tracker program is almost always broken into three main areas / stages:

1. The Instrument area : where you sculpt your sounds and (for MOD) load samples, set loop points, etc
2. The Pattern area : where you write 4 - 16 bar "phrases" of music using the instruments
3. The Sequence area : where you order the patterns. (order Verses / Choruses / Variations)

It is a simple approach to making music, but one that is surprisingly effective and very efficient. Why would you copy and paste the same 4 bar phrase when you can simply loop it? Then change it globally without re pasting? It also makes juggling the order of a tune around quite simple.

You could (of course) just write a ton of patterns and put them in order in the sequencer. This is generally what happens if you try to import a MIDI file into a tracker (like ModPlug). It will work, but be a bit confusing hence it is much better to track from scratch. Technically you could bring a 3ch MIDI into ModPlug, pull a 3ch MOD from MODplug into Goat tracker then just re-assign the instruments... but uh.. yeah... it'd be messy and trust me - when you are working with real sounds on playback it is way more exciting.


The Formats & The Programs!

There are three main "stages" in the tracking family:

1. CHIP trackers - which use an onboard sound chip to create sound - like a synth. Eg. the SID chip in the C64
2. Amiga trackers - which use a library of 8-bit mono digital samples. Polyphony is usually limited to 4 channels.
3. Nuskool trackers - which use libraries. of 16-bit samples incorporating envelopes + more. Huge polyphony.

ReNoise Tracker (= nuskool) Ultimate control using the same principle.. (getting a bit complex here) It is actually easier to start on an older more simple program like..	Goat Tracker! (Chip tracker for Win XP) Pattern Area on Left (list of notes & instruments) Sequence area and Instrument builder on Right.

1. Making C64 or Nintendo "Chip" Tunes

If you want to create authentic oldskool tunes for "retro" platforms such as C64 or Gameboy - then you should aim to make them playable on the real hardware. Imagine being able to put a real floppy into a C64, type the load command and hear your tune screaming out of the real deal. That is what this is all about :-]. It is an experience that is unexplainable and exceedingly satisfying.

There are two ways of (easily) creating chip music.

# Create the tune on a modern day "chip" tracker for PC/Linux/Mac then port it across to the real hardware (see above)
# Use a native tracker or oldskool composition program on real hardware or an emulator, such as CCS64

Either way, one of the major limitations you are going to have to face as a composer is the limited polyphony. In the case of the C64 this is 3 channels (officially anyway!). While this may sound limiting, it is a great challenge and very humbling as you are reduced to thinking about composition at a root level.

Typically this is a bass (tonic note), chord (usually the major or minor third), percussion, melody.. oh wait - that's 4 notes! This is where all the classic tricks come out:

- Rapid arpeggios (a defining "chip" sound!) You can do this at a note level or pre-program "chords"
- Combining a notes and percussive sounds into one instrument (especially good for bass drums)
- Using syncopation as such that your drums land at separate times to chord or bass
- Channel "juggling". Not "reserving" one channel for one instrument. Toggle between 'em :-)

While this may sound "too hard" it is actually quite easy. You have 3 channels and that is it. These three channels are always at your finger tips so quick experimentation is simple. It isn't like modern day programs where you have to open up plug ins and access separate parts and windows - eeek! Everything is on one screen at once and once you've worked it out the rest is twiddling. Most cool stuff happens by mistake <-- quote me on that!

The way I learnt to track Chip tunes - and would recommend - is to open up a demo file and play around. First - look at pattern sequencing and note entry. Then look at sequencing (order of the patterns) at which point you've probably written half of your first track. Finally, look at the instrument programming : this is the hardest thing to get your head around and requires reading of instructions. While it is easy to bring in a sample on an Amiga, something like a C64 requires the instruments to be programmed like an old analogue synth. Or like many analogue VST plug ins (if that helps!)

At a basic level (see picture below), creating an instrument comes back to choosing a series of waveform flavors (sin, tri, square), the octave (bass, lead, combo), putting an envelope on it (attack = how quickly the note cuts in, decay = how long the note crescendos for, sustain = fade out time, release = how long it takes to fade out after note is released). There is also a phasing-kinda effect to tweak. The rest is filters - which on C64 will have you scratching your head going "wtf?! why is effecting all 3 channels?!" but that is half the fun. Drums are harder - but generally just logical. A snare is a blast of white noise at rapidly varying volumes with a medium decay. A bass drum is a sine wave dive in about 100ms - but you'll see all the "recipes" in the demo tunes and you can generally "tweak." other peoples sounds. And build up a library of your own sounds (there are presets with GT)

Ninja Tracker (bottom half) has a similar style of Instrument designer with a more "raw" feel.	Typical C64 Instrument programming. Remember it is HEX so values are 0 to F where F = 16 You don't have to use all these... one wave flavor with Attack / Decay / Sustain makes sound.

So read the guides... rip apart the included demo tunes and have fun. Oh, and once you get into it, nobody is going to understand what you are doing and even a synth-head isn't going to understand why combining a snare and appegiated chord into a single instrument is so cool - which is the reason demopartys and chip compos started in the first place!!

All I can say about chip tunes (on a personal note) is that while I play live electronica at raves with a mountain of gear and spend my working days in a studio with more I/O's than I know what to do with - nothing comes close the the buzz of hearing a freshly composed chip tune or tracked MOD on retro hardware. It is a raw and real way of composing music and the tones are so mathematically pure and simple that it is actually possible to perfect every element. There is no reverb to hide behind, no endless list of controllers to be daunted by, no unlimited layers to clutter things up. A chip tune takes electronic music composition back to its purest form.

Give me the choice of a workstation with 1000 plug ins& unlimited tracks or a C64 tracker for a weekend - I'd take the C64 any day :-]-<

TOOLS / Downloads

I don't have time to make a comprehensive list, but for Goat Tracker (the PC tracker shown) or NinjaTracker will get you started.

2 . Making Amiga MODs

Making a MOD tune is actually very similar to tracking a Chip tune except you are working with samples and (generally) a prettier interface with easier copy and paste options, etc. Again - it comes back to the method above:

# 1. Instrument area : You have up to 31 allocations for samples. Each sample has a loop in / out function and you can tune it.

# 2. Pattern area: You have 64 "positions" to enter notes on 4 channels. Default tempo is around 120BPM and each "position" a 1/16

# 3. Sequencer area: You can order your patterns. Patt 1 might be the intro which plays twice, then 2 patts which make up verse 1... etc

If you want to create authentic oldskool Amiga tunes, check out the "ST" disk sets. These were the original Sample Tracker discs that heaps of ppl used to make music in the early days because no one could afford a decent sound capture device and probably didn't have anything to sample in the first place! "ST-01" to "ST-06" are well worth having a look at. (just change disk number of the address to access the others). The other way of getting instruments is to open other peoples MOD files and "save sample" from their sample libs. Just be sure to credit them in the file name :-) It's polite.

Of course, if you are super "leet" you can make your own samples. Creating seamless loops in tiny samples is actually quite easy if you time the loop point to a "cycle". This is harder than it sounds but the advantage is that you can use your pre-existing wave editor (like Audition or Audacity) to do this. You will also be able to source sounds, like classic 909 sounds or 303 sample packs, from the web or your VST programs. Just make sure that you Normalize your samples ... even use a bit of the old Maximiser to get them nice and compressed and loud. Solid chunky waveforms = good.

Samples : crank the f*ck out of them with a maximiser or hard limiter. Especially on drums. It hides the fact it is an 8 bit sample and generally sounds chunkier..	MODPlug in action (with PT style theme) 4 CH MOD is an Amiga format. If in doubt, open an existing MOD and erase everything to get a compatible file. F04 sets the tempo to 160BPM.

Don't worry if samples are a bit crushed or compressed - you don't have EQ or compressors anyway so pre-compression (especially on drums) is generally a good idea. You should also pitch your musical samples to C and export them at a custom sample rate of 16726Hz or 33452 hz (not 48khz or 44.1khz!!!). There is a reason for this which I'm not going to explain - just do it! They will also down convert to 8bit when you import them which you may want to do on export - although avoid noise shaping (aka. adding hiss to mask quantisation noise). Once you layer multiple sounds back together you will not notice quantisation distortion but you will notice multiplied layers of noise shaping. Hm. Yes. Or bugger it - just bring in 48khz samples, which as long as you bring everything in at the same sample rate, doesn't stop you working. You might want to use the "downsample" feature to half this rate else the note range won't extend far enough to play the notes at the correct speed. Or.... you could just use other peoples samples!!


There are two ways of (easily) creating MOD music for Amiga

# Create the tune on a modern day tracker for PC/Linux/Mac then port it across to the real hardware (generally much easier)
# Use a native tracker or oldskool composition program on real hardware or an emulator such as WinUAE*

* The problem you will face with WinUAE emulator is that you won't have the A500 ROM files required to boot. You actually need to "purchase" these as they are still under licence by Amiga... yeah... or something like that. They don't cost too much if you do decide to be legal though (plus you get all the variants which is quite handy). Also, you'll need an ADF "virtual disk" version of Protracker or whatever you choose to track with. It is generally easier just to use a nuskool tracker and oldskool mode.

WinUAE... Lots of Config options although you will need to learn which chipsets belong to which series of computers. The slowest is fine for Tracking.	Protracker for Amiga. It's easier just to use a PC / MAC / LINUX tracker to do the same thing.

The same limitations will face you as for a chiptune : limited polyphony and limited sample time. In the case of the MOD format there are 4 channels of polyphony - but you can do a ton of things to get around this!

- Combining multiple instruments in samples - esp for drums. Add the High Hat and Bass Drum together. Or make combo samples.
- Pre-built chords for Minor / Major / Sus and use of "pads" rather than wasting multiple channels on chords
- Drum-loops and pre-made arpeggios.Cut your drum loops into slices (at least 4). This will give you more options for variations.
- "Ducking" samples when bass drums or other solid instruments sound to give the illusion of a compressor / limiter
- And (as mentioned above) the old channel juggling trick :-)

If you have read the section on Chip Tunes (above) then follow the same procedure - open up some demo files and play around. First - look at pattern programming and note entry. Then look at sequencing (order of the patterns) then start bringing in your samples and making custom tunes later.

There is a technical, but quite easy to understand guide to tracking at: http://www.modplug.com/mods/handbook/handbook.htm

TOOLS / Downloads

I don't have time to make a comprehensive list, but:

MODPlug (the PC tracker shown) does the job OK and it what I've used for years away from the A500
MilkyTracker Seems to be the favorite for many people at the moment - it will also create more compatible Amiga files.
ProTracker V2.3d is the final "official" release of the classic Amiga tracker. I think I'm still 1.3 or something like that (!)

You can make surprisingly decent sounding tunes with just a handful of samples and some clever juggling of parts. If you listen to commercial drum 'n' bass, industrial or electro tracks you will notice that these tracks are often quite minimal and can be represented quite successfully with 4CH. Especially with if loops are being used. One of the down falls is the lack of highpass and lowpass filters in the MOD format - although you can actually create a "long" sample which sweeps from pass to no-pass and just use the "sample offset" command to trigger from different positions in the sample.

2. PIXEL GRAPHICS

Coming Soon. Will include:

Pixeling with C64
Amiga and a note on conversion from PC.

3. CONVERSION of content to Real Hardware

Coming Soon

How to create an ADF for Amiga (with links)
How to copy an ADF to a real floppy (with links)

How to create a D64 for C64 (with links)
How to create a real C64 floppy (with links)

How to create a PRG from an image file
How to create a PRG from a SID file