Superecho for Amiga 500

Around twenty years ago, Kevin Kelm, an Amiga 500 programmer made

'Superecho'.

That was a little program (18 Kbs) that processed input audio signal

creating delay effects and pitchs into 4 voices, thought to have fun with music or

microphone.
This program has 8 gadgets with numbers and 4 volume sliders that determine

the audio result.
The program basically capture the input signal on a buffer (set by user) and play

it on the intervals fixed by user, after record buffer is completed (fully filled). More

high the pitch frequency (more little the number), more faster plays the audio

captured without audiostretching, more lower (more big the number), the same

but slower.



This lines are the result of investigating about 'Superecho' to use it musically,

with instruments working with pitch shift intervals.

You just need an Amiga 500 with a parallel port audio digitizer and maybe an

Amiga Action Replay MKIII to freak a little more using the Cpu Speed knob to

deform the sound while effect occurs.



Samples on audio and the ZMF files of each song at
http://www.esnips.com/web

/Superechosongs
That ZMF files contain the samples to play it on the Zoom Sampler Software

emulator at
http://www.esnips.com/web/SonictronicaPrograms

Samples on video.

more samples at
http://www.esnips.com/web/SuperechoVideos
or http://www.youtube.com/user/sonictronica

(will be great that you send me your Superecho demo presets too on different

instruments)

Superecho Presets http://www.esnips.com/doc/980af130-263c-4e04-8c2c-

2fc7d3e8a0e0/superecho-presets.txt
or http://www.esnips.com/doc/a675fc67-

0175-4486-95fa-d75f2764a572/superechopresets.pdf

Superecho Presets on Adf (Amiga Disk Image) http://www.esni

ps.com/web/SuperechoAmigaDiskImages
These images doesnt work with actual amiga emulators cause these dont

emulate audio input 8 bits digitizers. You have to create real amiga disks cause

only works on a Amiga 500 (works on 1.2 and 1.3 rom).
Works like executable disks that doesnt need screen to work with Superecho,

just loading via the function keys the preset desired. The only problem is that you

have to reset the machine to play another preset from the same disk or another.

This disks are done freezing and storing the memory state when Superecho is

sounding via an Action Replay MKIII.

On the original program http://de4.aminet.net/mus/

misc/SuperEcho.lha you have to enter via keyboard all the numbers and

click 'go'. You can edit the init values via a hexeditor changing the 1520

command line. This will do that you will have to click on 'go' to start your preset

edited. But you need the screen for this. The advantage is that the loading

process is really, really faster in comparision to the disks i've done.

Some info about the prog. The root note are relative to each Sample Delay factor,

for example, on S (Sample Delay) factor = 1, the root or normal note that you play

on your instrument corresponds to value 288 to the channel frequency selected

(1 to 4, 2 for the left channel, two more for the right channel).If you want one

octave higher form the root note you have to divide root by 2, or if you want one

octave lower multiply the value by 2.
S factors lower has a really different texture that the higher.
S 0 to 99 frequency roots http://www.esnips.com/doc/1116efb8-082e-4c08-89f0-

733a321cf629/Superecho-S-roots.txt
Intervals http://www.esnips.com/doc/711587c2-a67a-

4db2-9cb8-dea2b4e09269/Intervals-Find.txt
How does it works more information
http://www.esnips.com/doc/16745e9e-7084-45f6-bcc3-

d97305f062d1/Kevin_Kelm_and_Alfred_J_Faust_talk_about.txt

Someday maybe a standalone hardware or plugin maybe possible.

By

the moment all i can do are on this lines, I am not a programmer.
If I can help...
mailto:sonictronica@yahoomail.com
And excuse my english.

More projects at...
http://www.blogger.com/profile/16583951687717145479