Synth with barebone ATMEGA328p PU chip
Opened this issue · 5 comments
montythepython commented
Hi @dzlonline,
Thank you for sharing this awesome project!
I have been using your library without any issues on different nano boards. I recently got my hands on a couple of atmega328p PU (28DIP) chips.
After boot loading and uploading the sketch it all works well until I connect the audio out pin (in my case, pin 3, using CHB).
I know the sketch is running well without the audio input connected because the code runs an LED sequence (sequencer steps) and it works. I modify the tempo with a delay function in the sketch and turning the tempo potentiometer affects the LED sequence tempo accordingly.
Moreover, sometimes I connect the audio pin out and I do get some notes. Sometimes just one and it freezes, sometimes a full sequence and then it freezes...
I have tried different chips and get the same result. I was wondering if this can be related to the way the Synth.h is setting up the board.
@troisiemetype, reading the reported issues before creating one, I found a thread with you that made me think you can also have a good idea about what is happening here.
Thanks!
dzlonline commented
Hi.
Question: by "connect the audio out pin" do you mean physically?
Dzl
…On Mon, Oct 5, 2020 at 9:36 AM montythepython ***@***.***> wrote:
Hi @dzlonline <https://github.com/dzlonline>,
Thank you for sharing this awesome project!
I have been using your library without any issues on different nano
boards. I recently got my hands on a couple of atmega328p PU (28DIP) chips.
After boot loading and uploading the sketch it all works well until I
connect the audio out pin (in my case, pin 3, using CHB).
I know the sketch is running well without the audio input connected
because the code runs an LED sequence (sequencer steps) and it works. I
modify the tempo with a delay function in the sketch and turning the tempo
potentiometer affects the LED sequence tempo accordingly.
Moreover, sometimes I connect the audio pin out and I do get some notes.
Sometimes just one and it freezes, sometimes a full sequence and then it
freezes...
I have tried different chips and get the same result. I was wondering if
this can be related to the way the Synth.h is setting up the board.
@troisiemetype <https://github.com/troisiemetype>, reading the reported
issues before creating one, I found a thread with you that made me think
you can also have a good idea about what is happening here.
Thanks!
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montythepython commented
Hi dzl,
Yes when I connect the speaker to pin 3 and ground.
Or I can have pin 3 and ground wires to the audio jack and when I plug in
the speaker/headphones, I have the issues I described
Thank you!
Le lun. 5 oct. 2020 à 11:38, Dzl <notifications@github.com> a écrit :
… Hi.
Question: by "connect the audio out pin" do you mean physically?
Dzl
On Mon, Oct 5, 2020 at 9:36 AM montythepython ***@***.***>
wrote:
> Hi @dzlonline <https://github.com/dzlonline>,
>
> Thank you for sharing this awesome project!
> I have been using your library without any issues on different nano
> boards. I recently got my hands on a couple of atmega328p PU (28DIP)
chips.
>
> After boot loading and uploading the sketch it all works well until I
> connect the audio out pin (in my case, pin 3, using CHB).
>
> I know the sketch is running well without the audio input connected
> because the code runs an LED sequence (sequencer steps) and it works. I
> modify the tempo with a delay function in the sketch and turning the
tempo
> potentiometer affects the LED sequence tempo accordingly.
>
> Moreover, sometimes I connect the audio pin out and I do get some notes.
> Sometimes just one and it freezes, sometimes a full sequence and then it
> freezes...
>
> I have tried different chips and get the same result. I was wondering if
> this can be related to the way the Synth.h is setting up the board.
>
> @troisiemetype <https://github.com/troisiemetype>, reading the reported
> issues before creating one, I found a thread with you that made me think
> you can also have a good idea about what is happening here.
>
> Thanks!
>
> —
> You are receiving this because you were mentioned.
> Reply to this email directly, view it on GitHub
> <#19>, or unsubscribe
> <
https://github.com/notifications/unsubscribe-auth/AA7XCSC7CFKTI5PZNZ5MZHLSJFZRHANCNFSM4SEKOGBA
>
> .
>
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dzlonline commented
Hi,
Sounds like your problems are electrical.
If you connect a speaker to a single pin (e.g. between CHA and GND) you
need to put a DC blocking capacitor in series with the speaker: e.g. 220
microfarads with the positive end connected to CHA and negative end to the
speaker.
If you do not want to use a capacitor you can use the DIFF mode and connect
the speaker between CHA and CHB.
Let me know if it solves your problem.
Cheers
Dzl
On Tue, Oct 6, 2020 at 11:58 PM montythepython <notifications@github.com>
wrote:
… Hi dzl,
Yes when I connect the speaker to pin 3 and ground.
Or I can have pin 3 and ground wires to the audio jack and when I plug in
the speaker/headphones, I have the issues I described
Thank you!
Le lun. 5 oct. 2020 à 11:38, Dzl ***@***.***> a écrit :
> Hi.
> Question: by "connect the audio out pin" do you mean physically?
> Dzl
>
>
> On Mon, Oct 5, 2020 at 9:36 AM montythepython ***@***.***>
> wrote:
>
> > Hi @dzlonline <https://github.com/dzlonline>,
> >
> > Thank you for sharing this awesome project!
> > I have been using your library without any issues on different nano
> > boards. I recently got my hands on a couple of atmega328p PU (28DIP)
> chips.
> >
> > After boot loading and uploading the sketch it all works well until I
> > connect the audio out pin (in my case, pin 3, using CHB).
> >
> > I know the sketch is running well without the audio input connected
> > because the code runs an LED sequence (sequencer steps) and it works. I
> > modify the tempo with a delay function in the sketch and turning the
> tempo
> > potentiometer affects the LED sequence tempo accordingly.
> >
> > Moreover, sometimes I connect the audio pin out and I do get some
notes.
> > Sometimes just one and it freezes, sometimes a full sequence and then
it
> > freezes...
> >
> > I have tried different chips and get the same result. I was wondering
if
> > this can be related to the way the Synth.h is setting up the board.
> >
> > @troisiemetype <https://github.com/troisiemetype>, reading the
reported
> > issues before creating one, I found a thread with you that made me
think
> > you can also have a good idea about what is happening here.
> >
> > Thanks!
> >
> > —
> > You are receiving this because you were mentioned.
> > Reply to this email directly, view it on GitHub
> > <#19>, or unsubscribe
> > <
>
https://github.com/notifications/unsubscribe-auth/AA7XCSC7CFKTI5PZNZ5MZHLSJFZRHANCNFSM4SEKOGBA
> >
> > .
> >
>
> —
> You are receiving this because you authored the thread.
> Reply to this email directly, view it on GitHub
> <#19 (comment)
>,
> or unsubscribe
> <
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montythepython commented
Hi, thank you.
Ok I will try it tonight. I have two set ups at the moment. Same circuit on
both, one with a nano and one just with the chip (plus crystal oscillator,
etc)
At the beginning I had nothing between the speaker and CHA but like this,
it does work on the nano and not on the chip.
I continued working on the circuit with the nano and added what I thought
was a low pass circuit you show in the beginning of your code examples but
I haven't tried it on the circuit with the chip.
Thank you, I will let you know.
Cheers
Le mer. 7 oct. 2020 à 12:42, Dzl <notifications@github.com> a écrit :
… Hi,
Sounds like your problems are electrical.
If you connect a speaker to a single pin (e.g. between CHA and GND) you
need to put a DC blocking capacitor in series with the speaker: e.g. 220
microfarads with the positive end connected to CHA and negative end to the
speaker.
If you do not want to use a capacitor you can use the DIFF mode and connect
the speaker between CHA and CHB.
Let me know if it solves your problem.
Cheers
Dzl
On Tue, Oct 6, 2020 at 11:58 PM montythepython ***@***.***>
wrote:
> Hi dzl,
>
> Yes when I connect the speaker to pin 3 and ground.
>
> Or I can have pin 3 and ground wires to the audio jack and when I plug in
> the speaker/headphones, I have the issues I described
>
> Thank you!
>
> Le lun. 5 oct. 2020 à 11:38, Dzl ***@***.***> a écrit :
>
> > Hi.
> > Question: by "connect the audio out pin" do you mean physically?
> > Dzl
> >
> >
> > On Mon, Oct 5, 2020 at 9:36 AM montythepython <
***@***.***>
> > wrote:
> >
> > > Hi @dzlonline <https://github.com/dzlonline>,
> > >
> > > Thank you for sharing this awesome project!
> > > I have been using your library without any issues on different nano
> > > boards. I recently got my hands on a couple of atmega328p PU (28DIP)
> > chips.
> > >
> > > After boot loading and uploading the sketch it all works well until I
> > > connect the audio out pin (in my case, pin 3, using CHB).
> > >
> > > I know the sketch is running well without the audio input connected
> > > because the code runs an LED sequence (sequencer steps) and it
works. I
> > > modify the tempo with a delay function in the sketch and turning the
> > tempo
> > > potentiometer affects the LED sequence tempo accordingly.
> > >
> > > Moreover, sometimes I connect the audio pin out and I do get some
> notes.
> > > Sometimes just one and it freezes, sometimes a full sequence and then
> it
> > > freezes...
> > >
> > > I have tried different chips and get the same result. I was wondering
> if
> > > this can be related to the way the Synth.h is setting up the board.
> > >
> > > @troisiemetype <https://github.com/troisiemetype>, reading the
> reported
> > > issues before creating one, I found a thread with you that made me
> think
> > > you can also have a good idea about what is happening here.
> > >
> > > Thanks!
> > >
> > > —
> > > You are receiving this because you were mentioned.
> > > Reply to this email directly, view it on GitHub
> > > <#19>, or unsubscribe
> > > <
> >
>
https://github.com/notifications/unsubscribe-auth/AA7XCSC7CFKTI5PZNZ5MZHLSJFZRHANCNFSM4SEKOGBA
> > >
> > > .
> > >
> >
> > —
> > You are receiving this because you authored the thread.
> > Reply to this email directly, view it on GitHub
> > <
#19 (comment)
> >,
> > or unsubscribe
> > <
>
https://github.com/notifications/unsubscribe-auth/AEL5YDBAC53TIGXH2UHF3Y3SJGH2DANCNFSM4SEKOGBA
> >
> > .
> >
>
> —
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montythepython commented
Hi dzl!
That was it! Thank you. No idea why it works with the nano but not with the
chip...
Next step is adding a midi out and integrating the code to what I already
have for a sequencer done with a 4051 chip.
Nice blog dzl, very impressive!. Looking forward to playing with your synth
library for the ESP32!
Cheers
Le mer. 7 oct. 2020 à 15:28, Dario Gomez <dariogomezperez@gmail.com> a
écrit :
… Hi, thank you.
Ok I will try it tonight. I have two set ups at the moment. Same circuit
on both, one with a nano and one just with the chip (plus crystal
oscillator, etc)
At the beginning I had nothing between the speaker and CHA but like this,
it does work on the nano and not on the chip.
I continued working on the circuit with the nano and added what I thought
was a low pass circuit you show in the beginning of your code examples but
I haven't tried it on the circuit with the chip.
Thank you, I will let you know.
Cheers
Le mer. 7 oct. 2020 à 12:42, Dzl ***@***.***> a écrit :
> Hi,
>
> Sounds like your problems are electrical.
> If you connect a speaker to a single pin (e.g. between CHA and GND) you
> need to put a DC blocking capacitor in series with the speaker: e.g. 220
> microfarads with the positive end connected to CHA and negative end to the
> speaker.
> If you do not want to use a capacitor you can use the DIFF mode and
> connect
> the speaker between CHA and CHB.
>
> Let me know if it solves your problem.
> Cheers
> Dzl
>
> On Tue, Oct 6, 2020 at 11:58 PM montythepython ***@***.***>
> wrote:
>
> > Hi dzl,
> >
> > Yes when I connect the speaker to pin 3 and ground.
> >
> > Or I can have pin 3 and ground wires to the audio jack and when I plug
> in
> > the speaker/headphones, I have the issues I described
> >
> > Thank you!
> >
> > Le lun. 5 oct. 2020 à 11:38, Dzl ***@***.***> a écrit :
> >
> > > Hi.
> > > Question: by "connect the audio out pin" do you mean physically?
> > > Dzl
> > >
> > >
> > > On Mon, Oct 5, 2020 at 9:36 AM montythepython <
> ***@***.***>
> > > wrote:
> > >
> > > > Hi @dzlonline <https://github.com/dzlonline>,
> > > >
> > > > Thank you for sharing this awesome project!
> > > > I have been using your library without any issues on different nano
> > > > boards. I recently got my hands on a couple of atmega328p PU (28DIP)
> > > chips.
> > > >
> > > > After boot loading and uploading the sketch it all works well until
> I
> > > > connect the audio out pin (in my case, pin 3, using CHB).
> > > >
> > > > I know the sketch is running well without the audio input connected
> > > > because the code runs an LED sequence (sequencer steps) and it
> works. I
> > > > modify the tempo with a delay function in the sketch and turning the
> > > tempo
> > > > potentiometer affects the LED sequence tempo accordingly.
> > > >
> > > > Moreover, sometimes I connect the audio pin out and I do get some
> > notes.
> > > > Sometimes just one and it freezes, sometimes a full sequence and
> then
> > it
> > > > freezes...
> > > >
> > > > I have tried different chips and get the same result. I was
> wondering
> > if
> > > > this can be related to the way the Synth.h is setting up the board.
> > > >
> > > > @troisiemetype <https://github.com/troisiemetype>, reading the
> > reported
> > > > issues before creating one, I found a thread with you that made me
> > think
> > > > you can also have a good idea about what is happening here.
> > > >
> > > > Thanks!
> > > >
> > > > —
> > > > You are receiving this because you were mentioned.
> > > > Reply to this email directly, view it on GitHub
> > > > <#19>, or unsubscribe
> > > > <
> > >
> >
> https://github.com/notifications/unsubscribe-auth/AA7XCSC7CFKTI5PZNZ5MZHLSJFZRHANCNFSM4SEKOGBA
> > > >
> > > > .
> > > >
> > >
> > > —
> > > You are receiving this because you authored the thread.
> > > Reply to this email directly, view it on GitHub
> > > <
> #19 (comment)
> > >,
> > > or unsubscribe
> > > <
> >
> https://github.com/notifications/unsubscribe-auth/AEL5YDBAC53TIGXH2UHF3Y3SJGH2DANCNFSM4SEKOGBA
> > >
> > > .
> > >
> >
> > —
> > You are receiving this because you were mentioned.
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> > <
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> > .
> >
>
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