Commit Graph

17 Commits

Author SHA1 Message Date
Scott Lawson
fba8175e99 Add zero padded FFT calculation, could help #25
Zero pads the audio time samples until the length is equal to the next largest power of two. This improves the algorithmic complexity of the FFT calculations.

Initialized the Hamming window when the module is loaded instead of every loop.

Replaced a call to numpy.roll() with direct array index manipulation.
2017-01-29 00:41:13 -08:00
George Hopkins
a74d404606 Fix unresponsive GUI on silence 2017-01-21 19:53:50 +01:00
Scott Lawson
133c65d9b5 Fixed indenting bug 2017-01-05 20:42:52 -08:00
Scott Lawson
fdf79018ad Fixed bug where disabling gui caused error 2017-01-05 02:03:54 -08:00
Scott Lawson
75d8e8d9f7 Typo 2017-01-05 00:13:39 -08:00
Scott Lawson
32cea53ea1 Fixed typo 2017-01-05 00:13:14 -08:00
Scott Lawson
0f29d7c614 Minor PEP8 formatting change 2017-01-04 23:21:09 -08:00
Scott Lawson
0e73fd1348 Improved GUI, fixed bugs, better visualizations
* Resolved an issue with the ESP8266 where gamma correction would be
performed twice. Changed GAMMA_CORRECTION to SOFTWARE_GAMMA_CORRECTION
to make a distinction between software and firmware gamma correction.
The ESP8266 does firmware gamma correction and dithering, while the
Raspberry Pi uses slightly more inferior software gamma correction.
Changed the software gamma table to match the gamma table used in the
ESP8266 firmware.

* Improved the spectrum visualization by using one of the color channels
to visualize the absolute value of the temporal derivative of the
spectrum. Also added a feature to reject the "common mode" spectral
components, which is analogous to the spectral DC component.

* Signficantly improved the GUI and added a frequency adjustment slider.
Adjusting the frequency range has a big impact on the visualization
output. Recommend using a high frequency range (something like 4 kHz -
10 kHz) when running the scrol visualization.
2017-01-04 22:12:12 -08:00
Scott Lawson
47aa7bfcdd Added a slider for contrast adjustment
Added a slider and variables for adjusting the contrast of the
visualization.
2017-01-03 19:16:45 -08:00
Scott Lawson
e3ebe167e8 PEP8 formatting 2017-01-03 16:48:18 -08:00
Scott Lawson
5c5300ba7f Minor PEP8 formatting changes 2017-01-03 16:46:19 -08:00
Scott Lawson
b10a7d0396 Added experimental support for Raspberry Pi devices
This commit adds support for the Raspberry Pi, which allows users to
create a completely standalone music visualization system. The Raspberry
Pi should be connected directly to a ws2812b LED strip. A PWM-capable
GPIO pin should be connected to the data line of the LED strip. A USB
audio input device should be connected to one of the Raspberry Pi's USB
ports.

It is recommended that the GUI and FPS output be disabled when running
the visualization on the Raspberry Pi. These features can degrade
performance on the already computationally limited Raspberry Pi.
2017-01-03 16:33:28 -08:00
Scott Lawson
46b404120f Fixed bug where ComboBox didn't match current effect
Fixed a bug where the GUI ComboBox value would sometimes not match the
effect being displayed. This bug sometimes occurs when the GUI is first
initialized. This change now ensures that the ComboBox value is
correctly initialized.
2017-01-01 13:12:38 -07:00
Scott Lawson
c725d395be Added ComboBox to GUI for effect selection
Added a ComboBox to the GUI to allow the user to change the
visualization effect without having to restart Python. The user can now
select from one of the following visualizations using the GUI: 'Scroll
effect', 'Spectrum effect', 'Energy effect'
2017-01-01 12:14:31 -07:00
Scott Lawson
3241e43435 Fixed a typo where multiple effects were uncommented 2016-12-30 22:19:46 -07:00
Scott Lawson
e874ed3b2c Resolved issues with Python 3.5 compatibility
Fixed some bugs that occurred in Python 3.5 but were not present in
Python 2.7. Most compatiblity issues were caused by incompatible type
casting of numpy arrays.
2016-12-29 15:51:38 -07:00
Scott Lawson
d9677a4f8e Renamed mel_visualization.py to visualization.py 2016-12-27 01:31:50 -07:00