1684

Weird. I’ve not seen this. Wondering if it could be coming from a module you’ve added that is polluting your power bus with noise?

1685

@bpcmusic Thanks for the answer. I actually recently removed the Teletype from my Palette case but I just temporarily put it back in my empty 7U case and tested it with the Txo and got the same noise.

I did notice that the noise changed based on the frequency at which the TXo’s oscillator was set, and that it was also different depending on the waveform : more present with sines than with waveforms with more harmonics it seems… :thinking:

1686

@oscillateur, I’m wondering if you are responding to the aliasing. The TXo & TXo+ do not have the types of output filters that a true digital oscillator would have. Oscillator functionality was a stretch-goal bonus feature for the module.

I dug up this old video that explores the waveforms and shows them without and then with a reconstruction filter (which could be any exterior filter; I was alpha-testing a fixed filter to do this).

Is that what you are hearing?

2 Likes
1687

Thansk for the response, @bpcmusic .

No, this is not the aliasing I was hearing but something quite lound and rhythmic in a way.
I’m definitely fine with some aliasing :wink:

I removed the Teletype from my case for a change of setup but left it in my other (bigger, unused) case with the TXi/o so I can test again when I have some time.

I definitely do remember using it as oscillators before and things were working fine. Could this be something that got moved or shorted somewhere ? I didn’t see anything obvious when looking at the module but I’m not an expert and the Palette case was a tight fit with the power and i2c cables, so something might have been pushed a bit at some point…

1688

I’ve got a fresh built TXo last week. Risky choice since I’m still getting used to TT but super fun still – it took two days being able to out a working trig from TXo :face_with_head_bandage:

Reading the TXo doc on Github, I stumbled upon this line: “Also, this will interact with the oscillator as well and become a virtual VCA for its output”. Any ready-made script or guidelines? I’m not sure how to implement this virtual VCA atm.

Thanks! :clap:

1 Like
1689

Hi @nrgiga , first you have to set the OSC out so example for the OUT 1:
TO.CV 1 V 5 (active the oscillation),
then, TO.ENV.ACT 1 1 (active the envelope)
and now you just have to trig it with TO.ENV.TRIG 1 .
It should works.

4 Likes
1690

Thank you! It works. Let’s see how far I can go from here.

1 Like
1691

experiencing lag from TXI of ~120 MS when polling the inputs.

Any potential causes for this? Other communications across the bus (KR.CV 1) takes less than 5 MS to give an accurate value. This is a BPC-bult model that I bought second hand.

1692

Ok, so after having owned 2 TXOs for almost two years, I finally decided to use one as oscillator. Boy-oh-boy!

Super precise tracking, already there/takes no space (because I had it already), waveform selected from teletype. The 2nd TXO is now running four oscillators:

  1. Paired with joranalogue fold 6
  2. Paired with doepfer diode ladder filter
  3. Paired with doepfer wasp filter
  4. Paired with nothing, just for headphone metronome (live).

Supported by quadrax and tangle quartet. Such a great variety of tones from these three voices, still lot’s of hands-on with the filters, envelopes and VCA.

7 Likes
1693

I honestly can’t sing it’s praises enough! I had a bash at using the internal enveloping last night and was seriously Impressed! It Really is a minimalist dream machine :star2: Obviously your tied to Tele, but the ratio of power, price and HP is pretty impossible to beat!

1694

not just teletype - you can use it with ansible, polyearthsea, orca’s heart, crow. it really is an awesome module.

2 Likes
1695

All this praise for the TelexO; all these nights spent refreshing the manufacturer’s webpage, hoping for an update…

1 Like
1696

Do you mean this:

1697

Yes, but built! I’m horribly incompetent with a soldering iron.

1698

I don’t think you can get it build anywhere, I think your best bet is to find someone to DIY it for you…

1699

Hi everyone,

anyone who also have a problem with the Telex Txi DIY-build concerning the adress jumper area? At my build I have on all three adress pins random voltage - even directly at the teensy without connection to the pcb of those 3 adress pins. This means my Txi is set to random device numbers each start-up of my modular system. I´m curious if anyone else had this problem? What could cause this behaviour of the teensy? My first Txi build which I did some months ago work perfectly and I find no build difference at first sight. Thanks for any hints!

1700

Lack of pull-down resistors on the address pins, see the designer’s earlier post:

The firmware could be easily adapted to set the internal pull-downs. I’m super crunched for time lately or I would do it.

1 Like
1701

Has anyone reached out to Michigan Synthworks about building Telex units? He’s the guy who first jumped onboard building the 16n for people.

1702

Raph was banned for self promotion without deeper participation in the community. I can speculate that there was more to the story but no one was particularly interested in discussing it last time I appealed on his behalf.

BPC’s licensing is certainly permissive enough to allow the sale of fully-built Telex expanders. I’m surprised there isn’t more of a builder-for-hire scene lurking at the fringes of our I2C “uber connected” community. Or maybe not surprised? Dunno, probably the topic deserves a thread in the meta category.

2 Likes
1704

@desolationjones @bpcmusic Is the firmware modification anytime soon planned? If not, maybe I could do a trial by myself. I´m not a programmer, but could try to set up the environment - but would need some advice where to do changes :thinking:. Already got a link from a guy, if this helps (?): Add OUTPUT_OPENDRAIN, INPUT_PULLDOWN for pinMode() by Xenoamor · Pull Request #114 · PaulStoffregen/cores · GitHub

@grey @SimonKirby @GoatFarmer
Maybe you could help out as I read that you had the same problem with the TXi built concerning the adress pins. Newer Teensy´s seems to has to be set to internal pull-up. Did you finally do a firmware modification? In the firmware of the teensy itself and not of the TXi I suppose? Maybe you have a short documentation or the modded firmware itself around. Or maybe you did a hardware mod and soldered resistors in? Just a hint would be great as my two units are otherwise useless… :neutral_face:
Thanks a lot!