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  1. C++ how to increment objects name in a loop ?

    Hello,

    I am not a C++ expert... and I don't know how to compact this kind of code in a loop :

    }
    pot0.update(output[0]);
    pot1.update(output[1]);
    pot2.update(output[2]);
    ...
  2. DAC and headphones, what is really possible or not ?

    Hello,

    I have been playing for a while with Teensy boards and here is a question about te builtin DAC. I must confess I have hooked headphones to the T3.2 DAC. I have put a capacitor to cut DC and...
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    My battery delivers 5V. I'll find a reference for...

    My battery delivers 5V. I'll find a reference for the regulator.
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    Hi Mark, Here is a simplified schematic. The...

    Hi Mark,

    Here is a simplified schematic.
    The Teensy board is hooked to a battery pack via USB. My amp is powered via Vin pin (= battery). It works but I get "digital" noise. I tried Analog GND...
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    Thanks Mark. I have a few class D chip PAM8403....

    Thanks Mark.
    I have a few class D chip PAM8403. It is better, but I still have coupling problems.
    Is it possible to have 2 fully isolated power rail from 1 battery ?
    Emmanuel
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    Sorry... it is TDA2822. The problem is not the...

    Sorry... it is TDA2822.
    The problem is not the chip I think, but noise coupling. I made test with other amps, same results. When I use an external amp with its own power supply, there is no noise....
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    ampli & Teensy on same power rail

    Hello,

    For a little portable synth, I try to power a T3.6 & a small amp (TDA 1822) with the same battery. It is working but I can't get completely rid off noise. I think I don't have any ground...
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    capacitive sensors and battery

    Hello,

    I know it is very difficult to deal with capacitive (touch) sensors with battery powered circuits. I read threads about the way to make it work :

    - First solution : 2 plates electrodes...
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    Thank you for your help. If it's a memory issue,...

    Thank you for your help.
    If it's a memory issue, there is no way I can use a T3.2.
    I tried to allocate more memory with AudioMemory(), but it doesn't work.
    I think I am going to use standard...
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    Hello, Here is a simple code that crashes my...

    Hello,

    Here is a simple code that crashes my Teensy 3.2.
    I use the builtin DAC.
    There is probably some kind of incompatibility between freeverb and band limited waveforms oscillators.
    Emmanuel...
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    Hello, I noticed a bug when using band-limited...

    Hello,

    I noticed a bug when using band-limited waveforms and freeverb. My T3.2 crashes when playing high pitch notes. No problem when using standard waveforms.
    My code is rather long. I am going...
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    Hi, Just to say thanks for this release. Band...

    Hi,

    Just to say thanks for this release.
    Band limited waveforms + clean Freeverb = big improvement for synths projects !
    Emmanuel
  13. Hi Frank, Yes it has been asked hundred times......

    Hi Frank,
    Yes it has been asked hundred times... but the threads often end with no solution.
    I found this :
    ...
  14. playSdWav object pitch shifting possible ?

    Hello,

    Is it possible to change the pitch of the playSdWav (or playFlashRaw) object ? The idea would be to change the speed at which the audio samples are read, but I doubt it is as simple as...
  15. Thank you very much MarkT. I am going to redo my...

    Thank you very much MarkT.
    I am going to redo my PCB design following your rules.
    Emmanuel
  16. need advises for designing low noise circuits

    Hello,

    I have been playing with Teensy for a while now, and I need some help to build less noisy circuits.

    I mainly build musical instruments and MIDI controllers with a lot of pots, switches,...
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    freeverb "ringing" modulation

    Hello,

    I can't get a clean reverb effect using freeverb. There is a kind of clipping or "ringing" modulation. I tried to change damping and roomSize setting, but it didn't solve the problem....
  18. Thank you all. I finally succeed in making an...

    Thank you all.

    I finally succeed in making an 8 voices synth, following examples and ideas of this thread.
    Emmanuel
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    Hi Paul, I use 10k pots. I am still making...

    Hi Paul,

    I use 10k pots.
    I am still making some tests to see where the problem is.
    Emmanuel
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    Hello, I have done more testing about analog...

    Hello,

    I have done more testing about analog inputs noise issue.
    First of all, filtering with caps + code solve the problem. But still, I would really like to know what's going wrong when audio...
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    Cutting pin 13 makes no difference. Adding a cap...

    Cutting pin 13 makes no difference.
    Adding a cap smooth the reading, but still some noise.
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    Thank you for you suggestions. Yes I think pin...

    Thank you for you suggestions.

    Yes I think pin 13 and A0 /14 are coupling.
    I am going to cut pin 13 and see.
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    Hello, Sorry I omitted these informations. I...

    Hello,

    Sorry I omitted these informations.
    I did this test on Teensy 3.5. I use teensyduino 1.54 beta 5.

    I noticed that in general that enabling the audio shield tends to add some noise on the...
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    noise on A0 when using audio shield

    Hello,

    I notice a strange problem.
    I have attached a pot to A0. When reading my pot output value, I have noticed there is a lot of noise (+/- 10). When my pot is connected on other analog inputs,...
  25. Hello Paul, Hello FRank, Thank you for your...

    Hello Paul, Hello FRank,

    Thank you for your answers. This is very helpful. So I will wait future releases.
    I have been testing the new 1.54 beta. Wav samples reading from SD card works now really...
  26. Hello Frank, Thanks for answering. I think I was...

    Hello Frank,
    Thanks for answering. I think I was not clear enough. I would like to use large wavetables and store them on external flash memory, or SD card. I am not sure this is possible. The idea...
  27. larger soundfonts on SD or flash memory

    Hello,

    I have been playing with soundfonts and wavetable synthesis. I was wondering if it could be possible to store wavetable samples on SD card or flash memory ? It seems to be a very difficult...
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    @frankB: installing the 1.54 beta has solved the...

    @frankB: installing the 1.54 beta has solved the problem. I can read mono wav files from SD without latency and artefacts.
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    It is better. Thanks for the ideas. Filtering...

    It is better. Thanks for the ideas. Filtering really helps.
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    Thank you. I am going to follow your suggestions.

    Thank you. I am going to follow your suggestions.
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    freeverb noise ?

    Hello,

    I am testing the freeverb object. I use exemples/audio/effects/freeverb. I use short audio samples to see how the reverb tail fades. I have noticed that there is quite a lot of noise in...
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    Hello, Just a small report about playing files...

    Hello,
    Just a small report about playing files from builtin SD.
    I made a simple sample player with T3.5 + audioshield + builtin SD. I trigger samples with of TouchPins.
    When testing, I noticed...
  33. OK. I do it.

    OK. I do it.
  34. Hello again, YES ! It's working ! I have no...

    Hello again,
    YES ! It's working !
    I have no more artefacts when playing mono files with AudioPlaySdWav object. I can play up to 6 samples (maybe more, I haven't tested yet) at the same time. Fast...
  35. OK i am going to try this beta right now and...

    OK i am going to try this beta right now and report.
  36. I think I have tried everything I could :...

    I think I have tried everything I could : different Sd cards, FAT16, FAT32, exFAT, mono or stereo files, wav, raw, interrupts, delays, envelopes...
    I also prepared my files with different softwares...
  37. Thanks for your suggestions. I think my files...

    Thanks for your suggestions.

    I think my files are OK. There is no DC offset, no clipped section. I can't understand why stereo samples are read smoothly and not the mono samples. I think it is not...
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    OK Mark, you're right... No code, ho help. I...

    OK Mark, you're right... No code, ho help. I apologize for this.
    I have open a new thread, in the right place, with a "ready to use" sketch :...
  39. ps : of course change the sample name...

    ps : of course change the sample name...
  40. playing samples from SD card strange behavior

    Hello,

    I have made a simple sample player with teensy 3.6 + audio shield. The samples are stored on buitin SD card and triggered with a bunch of Touch pins. To maximize polyphony and time access,...
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    I answer to myself. If I use stereo wave...

    I answer to myself.

    If I use stereo wave files, there is no clics. Only when playing mono files. Strange...
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    "clics" when playing from SD card

    Hello,

    I have made a simple samples player. The samples are stored on a Teensy3.5 built-in SD card. Samples are not longer than 2 or 3 seconds. They are mono, 44 khz, 16 bits.
    I have 8...
  43. stuck with polyphony (last note priority)

    Hello,

    I try to make a simple polyphonic synth. I would like to have 5 voices with last note priority. I have been fighting all day with the "last note priority" feature. I would really appreciate...
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    Thanks a lot Paul I am going to try your code.

    Thanks a lot Paul

    I am going to try your code.
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    pointers help for beginner

    Hello,

    I am sorry to post this problem that might look basic for the most of you but i am stuck.

    I am working with a simple wavetable synth. I try to find a generic way to change the instrument...
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    Thanks a lot UHF for the link. And thanks MarkT...

    Thanks a lot UHF for the link.
    And thanks MarkT for the explanation.
    I will give a try to theses little boards, this is exactly what I need.
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    multiplexing touch pins

    Hello,

    I try to multiplex Touch inputs but I get inconsistent values. I guess touch pins cannot be multiplexed. Did someone have any success multiplexing touch pins ?
    Emmanuel


    //Mux control...
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    Hello, I have tried the bad limited waveforms...

    Hello,

    I have tried the bad limited waveforms and I can confirm this is a major improvement. Aliasing is dramatically reduced. I have implemented a simple 6 voices synth on a Teensy 6, everything...
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    band limited waveforms

    Hello,

    I just want to know if band limited waveforms are available as audio objects ?
    There was a pull request here :
    https://github.com/PaulStoffregen/Audio/pull/360

    I can't see any change...
  50. Tank you all for your help. I am ready to go !

    Tank you all for your help. I am ready to go !
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