#3

Thank you for your feedback on this @tehn!

I experimented moving lines around to see if the audible artifacts had anything to do with the sequence of events, but it did not seem to have an impact.

There is definitely ā€œsteelinessā€ with 50ms slews and definitely shorter ones.

Would it be helpful for me to record some of this? I am pretty sure you will be able to reproduce this easily though, playing some sine wave and using a VCA from Quadra or such.

If this is something that can be tweaked, I think it would be worth attention, especially for dynamic envelope generation, which Teletype would be amazing for.

#4

Bumping this one up as Iā€™m investigating something similar.

Curious if you got any further?

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#5

Bumping with the same question

#6

Bumping again, iā€™m interested in digging deeper in this topic as well!

#7

will investigate next week with a VCA

first thought, might be worth limiting the range-- not jumping 0-10v but trying 0-5v.

CV 1 V MUL TOSS 5

(TOSS is the same as RAND 1)

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#8

Hi, just wondering, why there are no envelopes
I know itā€™s possible to do CV.SLEW X 600; CV.SET X V 10; CV X 0; < right?

But itā€™s not possible to do non-linear stuffā€¦
Could it be implemented?
Also, non-linear slew would be awesomeā€¦

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#9

Apologies for expanding the conversation to the, er, expanders. But, the TELEXo adds 4 envelopes per unit to the Teletype that it is connected to. In the current firmware they are AD envelopes, with different times (in ms, sec, and min) for attack and release. The ā€œpeakā€ is set by the CV voltage of the corresponding channel; positive voltages cause envelopes to go up and negative the opposite. The offset command shifts what is considered ā€œzeroā€ for the envelope.

For example, here is an envelope that goes from 0V to -5V when triggered (the third command):

TO.CV 1 V -5
TO.ENV.ACT 1 1
TO.ENV.TRIG 1

If you want the envelope to rest at 5V and trigger to 0V, you can do this:

TO.CV.OFF 1 V 5
TO.CV 1 V -5
TO.ENV.ACT 1 1
TO.ENV.TRIG 1

You can also cause the end of rise and end of cycle events to fire triggers (on the unit containing the envelope) [TO.ENV.EOR & TO.ENV.EOC operators]. The envelopes can loop [TO.ENV.LOOP operator]. Finally, if you set the CV output to logarithmic mode [TO.CV.LOG], you can get log envelopes of various ranges.

See the command documentation for more information. :slight_smile:

https://monome.org/docs/modular/teletype/manual/#telexo-teletype-output-expander

And the handy command reference:

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#10

If only there were more telexo available for orderā€¦ :wink:

4 Likes
#11

Hi,

I tried to replicate this script in order to get the envelopes as drawn by @laborcamp.
The script as shown by @laborcamp did randomize voltages, so the envelopes would never look as pictured I think (same voltages for on and off):slight_smile:
This is my script, it only randomizes envelope slew lengths and metronome time.
There is a toggling of TR 1 output with purpose of visualizing the behavior of the CV 1 output against it.

T MUL 50 RRAND 1 8
M T; A FLIP; TR 1 A
CV.SLEW 1 T
IF A: CV 1 V 5
ELSE: CV 1 V 0

CV 1 and TR 1 are set to zero in the init script.
When I put both signals TR 1 and CV 1 on a signal scope, it seems that the TR 1 signals keeps up pace with the metronome time changes, but the slew doesnā€™t, it goes a bit wild. Sometimes it follows correctly, sometimesit is too slow or sometimes too quick. So what is happening exactly?

Could it be that simultaneously changing metronome time and slew time in the metronome script is not supported in the firmware?
Is there any way to get this done without patching cables?

Thanks!

Best,
Pascal

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#12

I adapted the script a bit further and managed to get the envelopes exactly as pictured.
An M.RESET command at the right spot did the trick

M T; A FLIP; TR 1 A
M.RESET
CV.SLEW 1 T
IF A: CV 1 V 5
ELSE: CV 1 V 0
T MUL 50 RRAND 1 8

But I also experience sporadic noise in an VCA-channel when using these envelopes.
Putting the envelopes on a decent scope showed stepping in the (steep) curves.
Stepped curves are probably not the best way to open up VCAā€™sā€¦best to connect a slew limiter in between.

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#13

Yes, I have experienced that steppiness also.
However, I was able to accomplish this sort of functionality using the Telex expander, using both slew, and/or the ENV functions. Good news there is that it seemed to handle this with no audible noise artifacts.

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#14

Iā€™ve noticed that the update rate of the CV outputs is about 6ms per step, I would have liked a faster DAC output rateā€¦but I suppose itā€™s a hardware related issue, so there is no update possibilityā€¦

Iā€™ve checked the telex expanders, they seem to add quite some functionality.
the only problem I would encounter is the ability of learning the command set by heart , they cover a couple of pages in the manual :slight_smile:

and of course, one would need more scripting possibilities, but thatā€™s worth another discussion :smile:

#15

curious if using Ansible as a TT expander allows for better DAC rates. I know there was a specific fix for Arcā€™s DAC refresh period. Does this help for TT envelopes without noise?

#16

Just for informational purposes, the TXo runs at a sampling rate of 15,625Hz. CV is currently updated at that rate out the16-bit DACs that service the full output range of -10V to +10V.

#17

Hi! Brand new Teletype user. Iā€™m trying to set up Teletype as a very simple AD envelope generator, or really just a D, and I didnā€™t find something this basic in one of the other threads.

I think I am missing something fundamental, but the studies arenā€™t helping me. My script 1 is just:

CV.SLEW RRAND 100 300 # Set slew somewhere between 100 and 300ms
CV.SET 1 V 10 # Set CV1 to 10V, ignoring slew
CV 1 0 # Set CV1 to 0, respecting slew

Iā€™m sending this a trigger. I would expect this to produce a simple variable length decay envelope, but it instead just settles on 0 (or 5V, or whatever I set the third line to). Itā€™s acting more like the whole script is evaluated at once.

What am I missing? Thanks for any help!

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#18

Line 2 and line 3 need to be triggered separately.

#19

I think you have to specify the CV output you want to apply SLEW at:

CV.SLEW x RRAND 100 300

Otherwise it will just get you the actual set slew value of a random CV output between 100 and 300.

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#20

Sorry i think that was a transcription error, but will definitely check that!

#21

That must have been it. With your correction it works great.

Wow this thing is going to be fun.

#22

Hoping to see you here, grokking the TT with us newbies :slight_smile: Iā€™d love to get some discussion going around useful code snippets and things like that. Teletype workflow, basics, and questions

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