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Automatically exported from code.google.com/p/mobilesynth
Support an arpeggio, using the new key stack.
There should be a rate slider, and some settings that control the order (maybe
random?)
Original issue reported on code.google.com by [email protected]
on 2 Apr 2009 at 5:34
The keyboard should stay with a default of the current octave, but also support
lower octaves as
well -- awesome bass!
Original issue reported on code.google.com by [email protected]
on 15 Mar 2009 at 7:48
AudioQueue was not design for low latency audio. The audio output should be
re-written to use AUHAL instead.
Original issue reported on code.google.com by [email protected]
on 24 Dec 2008 at 1:16
What steps will reproduce the problem?
1. Turn off osc1
2. Turn up osc2
3. Hold any note
4. Adjust the osc2 cents slider
What is the expected output? What do you see instead?
The tone should adjust continuously as the cents increase or decrease.
Instead, it increases like a
step function every few cents.
Original issue reported on code.google.com by [email protected]
on 22 Feb 2009 at 9:12
The ability to program simple (8 note?) sequences would be terrific. Not
sure how this would fit with a monophonic model though.
Original issue reported on code.google.com by [email protected]
on 10 Aug 2009 at 2:15
Modulation can cause clipping. To reproduce:
1. Set the oscillator volumes to near 1 or more
2. Raise the modulation amount to be greater than zero
This should never cause clipping.
Original issue reported on code.google.com by [email protected]
on 24 Dec 2008 at 10:19
What steps will reproduce the problem?
1. Press a key on the keyboard
2. Press another key without releasing the first
3. Release the first key
What is the expected output?
The first note should sound at 1. It should transition to the second at 2.
At event 3, the second note should keep sounding until that key is released.
What do you see instead?
The first note sounds. The second note sounds as long as the first key is
depressed. When the first key is released the second note stops.
What version of the product are you using? On what operating system?
Current version on iPhone as of March 8.
Please provide any additional information below.
There may be difficulties handling this with the way the API sends
multitouch info, but other apps have resolved the issue. I believe that
noise.io had a similar problem when it was released and it was resolved.
Original issue reported on code.google.com by [email protected]
on 8 Mar 2009 at 3:47
This is very hard to reproduce consistently. I am using mobilesynth code in an
early-stage iPad app and I have discovered that sometimes
ResonantFilter::GetValue() can return a NaN value which fills the output buffer
with maximum volume samples.
The problem seems to be that the variable y4_ in that function can occasionally
wildly oscillate, as things attached to power functions are wont to do. Within
three or four steps it's outside MAXFLOAT and that causes the other vars (y1_
and so on) to also breach their boundaries.
I have implemented a quick fix, placing this line right at the top of the
function:
// Give the filter a whack with a hammer if it's out of control
if (isnan(y4_)) {
y1_ = 0.0;
y2_ = 0.0;
y3_ = 0.0;
y4_ = 0.0;
oldx_ = 0.0;
oldy1_ = 0.0;
oldy2_ = 0.0;
oldy3_ = 0.0;
}
Which appears to resolve the issue. It's not very pretty - the hammer analogy
was deliberate - but it does the job. I haven't got to the bottom of why the
values occasionally go wild, but because it's so intermittent and hard to
reproduce my guess is that it only occurs at very specific points on the
oscillator cycle, so the filter doesn't 'catch' that x value every single time.
I am setting up the synth like so:
controller_ = new synth::Controller;
controller_->set_osc1_level(1);
controller_->set_osc1_wave_type(synth::Oscillator::SAWTOOTH);
controller_->set_filter_cutoff(15000.0);
controller_->set_filter_resonance(1.0);
controller_->set_modulation_amount(0.0);
So no envelopes or modulation get initialised. I realise this may also be part
of the problem since it's not the typical use case where you have some
controllers on-screen with sensible values pre-set. Then I simply call:
controller_->NoteOn(note)
when my app wants to play a sound (and NoteOff when it stops.)
Hope this helps. Thanks for the excellent code which is giving me a nice
introduction to synthesis.
Tim
Original issue reported on code.google.com by [email protected]
on 21 Nov 2011 at 10:34
What steps will reproduce the problem?
1. With glide enabled, play two notes in succession far apart in pitch
2. Play two notes in succession close together in pitch
What is the expected output? What do you see instead?
The glide between the "close" notes should be much faster than the glide
between the "far apart" notes. Instead, it seems to be constant time, so
the glide rate is very slow when the notes are close. I don't think this
is how most monophonic synths operate and it sounds strange.
What version of the product are you using? On what operating system?
Current on iPhone as of March 8.
Original issue reported on code.google.com by [email protected]
on 8 Mar 2009 at 3:56
A splash page is needed. Starting up black is not a very nice experience.
Original issue reported on code.google.com by [email protected]
on 22 Feb 2009 at 9:14
What steps will reproduce the problem?
1. Run app on device
2. Running on device
3. Pressing any key
What is the expected output? What do you see instead?
I expect to hear something, but there is no sound.
What version of the product are you using? On what operating system?
Using version 1.1 on iOS 5
Please provide any additional information below.
(none)
Original issue reported on code.google.com by [email protected]
on 25 Sep 2011 at 2:36
What steps will reproduce the problem?
1. Press any key when glide mode is enabled and no other note is playing
What is the expected output?
The note should start from its native pitch.
What do you see instead?
Note starts from the previous note's pitch.
What version of the product are you using? On what operating system?
Current on iPhone as of March 8.
Please provide any additional information below.
Original issue reported on code.google.com by [email protected]
on 8 Mar 2009 at 3:51
What steps will reproduce the problem?
1. keyPress = [[KeyDownInfo alloc] init];
2.
3.
What is the expected output? What do you see instead?
leaking should release somewhere
What version of the product are you using? On what operating system?
Please provide any additional information below.
Hello Allen, the soft is leaking a little bit...
But it is a great job...
Original issue reported on code.google.com by [email protected]
on 11 Nov 2010 at 9:54
None of the strings in the UI are localized.
Original issue reported on code.google.com by [email protected]
on 22 Feb 2009 at 10:47
It would be nice to implement some other effects:
- Ring modulation
- Delay
- Looping
Original issue reported on code.google.com by [email protected]
on 22 Feb 2009 at 9:27
The Pitch modulation does not seem to be affected by the "Amount" knob.
Original issue reported on code.google.com by [email protected]
on 22 Feb 2009 at 9:13
The filter cutoff frequency should probably be a log scale instead of a linear
scale.
Original issue reported on code.google.com by [email protected]
on 22 Feb 2009 at 9:19
It is easy to accidentally switch to another control pane when trying to adjust
a slider. Maybe the
sliders should be vertical instead of horizontal?
Original issue reported on code.google.com by [email protected]
on 22 Feb 2009 at 9:19
The keyboard view needs some help:
1) Its too large for CoreAnimation to draw as a single UImage
2) It does not update when a key is pressed (probably needs multiple layers to
accomplish)
3) It needs a "scroll lock" button for note slides
4) The view should start somewhere in the middle of the keyboard instead of on
the low end.
Original issue reported on code.google.com by [email protected]
on 24 Dec 2008 at 8:10
Frequency should shift at a variable rate when moving from one key to another.
Original issue reported on code.google.com by [email protected]
on 24 Dec 2008 at 1:20
Use fixed point math instead for most operations. See fixed_point.h
Original issue reported on code.google.com by [email protected]
on 22 Feb 2009 at 6:46
There should be a control section that lets you load/save set presets for all
of the various controls
Original issue reported on code.google.com by [email protected]
on 22 Feb 2009 at 9:20
The envelope doesn't work properly when the note enters the released state
while during attack or
decay.
Original issue reported on code.google.com by [email protected]
on 24 Dec 2008 at 10:17
It would be nice to have a graphic that represents the cutoff filter frequency,
and resonance frequency (when that feature is added).
Original issue reported on code.google.com by [email protected]
on 22 Feb 2009 at 9:14
A MobileSynth icon is needed
Original issue reported on code.google.com by [email protected]
on 22 Feb 2009 at 9:15
The filter also needs a controllable envelope.
Original issue reported on code.google.com by [email protected]
on 24 Dec 2008 at 1:17
What steps will reproduce the problem?
1. Set glide rate to the max
2. Hit a low note
3. Hit a high note
What is the expected output? What do you see instead?
The note should continuously increase. Instead, it sounds like a step function
Original issue reported on code.google.com by [email protected]
on 22 Feb 2009 at 9:09
What steps will reproduce the problem?
1.start the app
2.touch the lower area of the screen - where the
keyboard is
3.nothing happens?
What is the expected output? What do you see
instead?
I expect to get some visual feedback that I've pressed a
key. Also I'd expect to hear some audio.
What version of the product are you using? On what
operating system?
newest version from app store. latest iPhone OS 2
update
Please provide any additional information below.
Original issue reported on code.google.com by [email protected]
on 12 Apr 2009 at 6:52
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