See the pink noise object for example.

Without this, 2 instances will create exactly the same stream of numbers, and won't be "random" is added or used together in the same audio chain.

Code here:

http://forum.pjrc.com/threads/24793-Audio-Library?p=54479&viewfull=1#post54479

Data here:

http://forum.pjrc.com/threads/24793-Audio-Library?p=54482&viewfull=1#post54482

Also, need to check if the input range really is using 1.2V internal reference.

Perhaps different ways to shape (envelope) and filter to create different percussive sounds?

Examples like Analyze/FFT should work without the output object.

http://forum.pjrc.com/threads/24793-Audio-Library?p=43032&viewfull=1#post43032

This is probably unavoidable on Teensy 3.0 where only 4 DMA channels are available.

On Teensy 3.1, the DMA channels could be arranged differently to allow these 2 libraries to be used in the same project

In a style similar to Arduino's examples, in File > Examples > 01.Basics

The DC level is automatically found and removed, but it's too fast for some applications...

http://forum.pjrc.com/threads/24793-Audio-Library?p=42711&viewfull=1#post42711

http://forum.pjrc.com/threads/24793-Audio-Library?p=42715&viewfull=1#post42715

Post with incorrect waveforms:
http://forum.pjrc.com/threads/24793-Audio-Library?p=42702&viewfull=1#post42702

http://forum.pjrc.com/threads/24793-Audio-Library?p=43135&viewfull=1#post43135

(sample code)
http://forum.pjrc.com/threads/24793-Audio-Library?p=43163&viewfull=1#post43163

Maybe this can be adapted to the GUI's documentation?

https://github.com/PaulStoffregen/Audio/blob/master/examples/Effects/Flange/effects_info.h

Hello,
I would like to request dynamic sample rate selection for each AudioPlayMemory, so it can be used to play musical notes (e.g. like on a sampler).

SdCardTest and sd_speed_test should be merged into a single test.

It should also do a speed test with 2, 3, 4, 5, 6, 7 and 8 files.

Sample files should be provided on a web page.

People can't run the speedtest with the same files....

http://forum.pjrc.com/threads/24793-Audio-Library?p=43934&viewfull=1#post43934

Those 2 files were copyrighted music that we don't have permission to distribute. Need to find something public domain or creative commons (probably should allow commercial use if PJRC is going to put the files on the website)

Maybe someone really experienced with synthesis could create a nice example using this object and perhaps the envelope or other waveforms at low frequency to control it? Ideally, something rhythmic or musical sounding, rather than "random noises", would be perfect.

As sine had sine_fm added, so waveform should have waveform_fm added, using similar code. Suggested summary:

Create a modulated waveform: sine, sawtooth, square, triangle or arbitrary wavetable, using any audio signal to continuously modulate the waveform frequency.

Currently it returns raw integer, not scaled to 1.0 float like the rest of the library.

A mechanism is needed to be able to copy-n-paste the URL from the browser's address bar, to refer to documentation for a specific object. Then when a user load the GUI with that extra info appended, the right panel will automatically be initialized with that info.

Hi Paul,

First of all, thank you so much for this awesome library! I'm very excited to be using this with the Teensy 3.1. I noticed you wrote:
"The beta test Audio Library has a known bug limiting AudioAnalyzeFFT256 to only a single instance. Future versions will correct this issue, allowing you to have multiple AudioAnalyzeFFT256 objects, each analyzing a different audio source." on the teensy page (https://www.pjrc.com/teensy/td_libs_AudioAnalyzeFFT.html).

Is there a way you could provide some more context on the bug / perhaps a suggested workaround for getting FFT to run on stereo or multiple mono input? Thanks!

Hello,

It seems like the Volume Control of the Library doesn't work properly
(e.g. Sound is louder is values are lower)

AudioControlSGTL5000 codec;
codec.volume(80);

as where some examples shows working with floats between 0.0 and 1.0.

Is this a bug or how is it intended to work? The examples show different
methods.

There should be an analyze object that reports "volume". It should take the absolute value of the input, and apply different filters for increases (short time constant) and decreases (long time constant) to simulate the time response of a traditional VU meter. Maybe the time constants should be configurable?

One of the most frequently used synthesizer waveforms is a pulse ( a rectangular wave with adjustable mark/space ratio). The square wave is a special case of pulse, with 50% mark/space. It is also common to modulate the pulse width dynamically.

Suggest two waveforms: pulse (with a single fixed value of duty cycle, between 0.0 and 1.0) and pulse_pwm (using any audio signal to continuously modulate the pulse width). These could be added as new enumerated types to waveform, or added as separate functions, depending on what is easiest to add.

(These should also pick up the _fm additions suggested in a separate issue).

bringing the coefficient calc into the object would also be good.

http://forum.pjrc.com/threads/24793-Audio-Library?p=43022&viewfull=1#post43022

Maybe this can be adapted to the GUI's documentation?

https://github.com/PaulStoffregen/Audio/blob/master/examples/Effects/Chorus/effects_info.h

Currently it's about 3.1Vp-p.