Notifications

NETMF & Gadgeteer
1

I’ve finally found a little free time to get back to work on Pyxis/Netby and I was wondering if anyone who’s better at sounds than me wouldn’t mind making a few notification sounds for the piezo. So far I’ve managed a little chirp.

It’d be nice to have 3 sounds:
Error
Peripheral Plugged In
Peripheral Unplugged

Any takers?

2

Have you thought about just making a driver for PCM audio, then putting in some “real” sounds?

3

No point since GHI is releasing one in the next update. This is just a in the mean time sort of thing.

Plus the built-in Piezo doesn’t seem to be on a PWM pin so this would be a backfall for when there isn’t an audio out. I’ve already connected a jack to the AnalogOut pin for when GHI’s code is out. :smiley:

4

That’s what I meant but at any rate, I think our only option for the piezo is to buzz it at a few select freqs. Maybe chain them together or something.

5

Hi I have a table that was created on the pic16f84 with pitch and envelope with a lookup to all available notes (It was a simple doorbell project) this used the good old simple peizo and produced a pretty good sound, I eventually made a simle organ from it…

It’s in assembler but all you need is the table (and adjust the frequency)
If you want it ill dig it out

Ian

6

Dig away. It could be extremely helpful in this case.

7

Thanks Ian!

8

This is what I use for the cobra project:

Utility.Piezo(1000, 10);  //open sound
Utility.Piezo(1000, 100); //close sound

//changes made sound
Utility.Piezo(1000, 10);
Utility.Piezo(2000, 10);
Utility.Piezo(3000, 10);

Feel free to tweak. It’s cool to generate sounds, lol :smiley:

9

I suppose we could make a class to auto sequence frequencies instead of just making the calls yourself. We could have that as a base for netby then also have a driver for the PCM audio and MP3 extension.

10

I’ll get the full code tonight

But in the meantime I have all the frequencies for the “Utilities.Peizo(pitch,duration)” class

You can make any ditto you want by throwing the right frequency at it

       NOTE          FREQ

LOW A 440
A# 466
B 494
C 523
C# 554
D 587
D# 622
E 659
F 698
F# 740
G 784
G# 831

MID A 880
A# 932
B 989
C 1046
C# 1109
D 1175
D# 1244
E 1318
F 1397
F# 1480
G 1568
G# 1661

HIGH A 1760
A# 1865
B 1975
C 2093
C# 2217
D 2349
D# 2489
E 2637

11

Why not play midi file on pwm?

12

You mean with the GHI PCM driver?

13

Nop! MIDI on PWM and WAV on AnalogOut simultaneously :smiley:

[url]NET Micro Framework Stepper Motor Midi Player - YouTube

14

^^^ My cousin was one of the devs on that project.

15

Owww what cool that video is amazing .

16

Aww that is really cool.

17

The table is the same as the one I already posted
but using the peizo I create a cool ditty


case ID_CLICK:
                    {
                       Utility.Piezo(523, 50);    // C
                       Utility.Piezo(659, 50);    // D
                       Utility.Piezo(784, 50);    // E
                       Utility.Piezo(1046, 100); // C
                       break;
                    }

To go to lower an octave the frequency is halved and doubld to go up
with 4/4 time a semiquaver eqautes to 333ms
It does produce better sounds though as gus said through the analog out.

18

I think we could probably simplify it a bit, just have it take in an array of structs. Each struct would hold the note data.