| Panel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| ||||||||||
Projecttitel: Juergen Haible Triple Chorus in MOTMStatus:in planning 2014
Startdate: 28.04.2014Duedate: 01.09.2014December 2014 /the last build was 02/2019Manufacture link: http://www.jhaible.com/legacy/triple_chorus/triple_chorus.html |
further links: http://www.dragonflyalley.com/jHTripleChorusConstruction.htm
backup here:Dragonfly Alley MOTM Synthesizer Jurgen Haible _Triple Chorus_ Construction.pdf
BOM:
The Equalizer potentiometers are 10k linear each (3 in total).
You may want to add an input level potentiometer: 10k log ... 50k log are good values.
Input / output jacks depending on what signals you want to bring out.
Mode and bypass switch can be realized with a rotary switch or with a set of toggle switches - more about this later.
...
http://www.reichelt.de/?ACTION=20;AWKID=41401;PROVID=2084
| Tip |
|---|
u1 = 100nF , u1 near CD4011 is MLCC c0g or WIMA mks (polyester) |
Widget Connector url https://www.youtube.com/watch?v=YmRSArFFm5k
Building Tip from Juergen.H
...
PDF name jh_triple_chorus_overlay.pdf
jh_triple_chorus_connections_1p2t_switches.pdf
PDF name jh_triple_chorus_connections_1p2t_switches.pdf
jh_triple_chorus_sch_page1.pdf
PDF name jh_triple_chorus_sch_page1.pdf
jh_triple_chorus_sch_page2.pdf
PDF name jh_triple_chorus_sch_page2.pdf
Background from J.Haible website
The lush Sound of the Solina (TM) Ensemble is created by 3 BBD delay lines that are modulated in a unique way:
There are two 3-phase modulation generators, one running at slow speed ("Chorus"), and one running at high speed ("Vibrato").
...
Filtering in general, and the Crumar Performer in particular
In the Solina, the signal as it comes from the tone generation and string sound shaping, runs thru a second order 12kHz filter before it goes into the BBDs. This acts as an anti-aliasing filter, as well as adding to the sound shaping a bit.
With longer BBD lines (TDA1022 instead of TCA350), the clock frequency can be higher, this allowing for a wider bandwidth without increased aliasing.
So I've implemented a 16kHz anti-aliasing filter, plus a 12kHz filter, to be able to choose a broadband sound vs. a slightly darker sound.
A third option was inspired by the Crumar Performer: It has a very specialized 3-Band EQ that is very effective on string sounds. With my Performer, I get very convincing, yet very different, string sounds with a 0-10-0 setting and with a 10-0-10 setting (low-mid-high).
I've included this wonderful EQ in my emulation.
First Step- sockets.. for 3 triple Chorus.
Build tips:
calibration:
U6: Pin 1 6hz
U6 PIN 7 0,6HZ (YOU NEED A DSO to measure this slow value with 1s/ and 100mV, typically analog scopes only offer 200mS)
use CD4011UBE or try different vendors
| Gallery (Deprecated) |
|---|