Fourier

Latest revision as of 02:23, 25 December 2008

Fourier

a realtime frequency analysis of recorded sound data and displays it on screen.

Homepage: http://www.reitwiessner.de/openmoko/fourier.html
Package: fourier_1.1_arm.ipk
Tested on: Om 2008.8,FSO MS 4

Fourier does a realtime frequency analysis of recorded sound data and displays it on screen.

The sampling rate is 44100 and it uses 256 samples to calculate the transform. The output is done in a sliding window fashion.

Needed Libraries

Fourier uses libsdl for graphics output and libfftw3 for the frequency analysis. You need to additionally install libfftw3 for FDOM, a suitable package can be downloaded here: libfftw3-3_3.1.2-r1_armv4t.ipk (8.5 KB) (obtained from http://www.angstrom-distribution.org/feeds/2007/ipk/glibc/armv4t/base/libfftw3-3_3.1.2-r1_armv4t.ipk)

opkg install http://www.angstrom-distribution.org/feeds/2007/ipk/glibc/armv4t/base/libfftw3-3_3.1.2-r1_armv4t.ipk

libsdl-1.2-0

http://www.opkg.org/packages/fourier_1.1_arm.ipk

@@ Line 4: / Line 4: @@
 Screenshot=Fourier screenshot.png|
 Homepage=http://www.reitwiessner.de/openmoko/fourier.html|
-TestedOn=Om 2008.8|
+TestedOn=Om 2008.8,FSO MS 4|
-PackageName=fourier_1.0_arm.ipk
+PackageName=fourier_1.1_arm.ipk
 }}
@@ Line 30: / Line 30: @@
 libsdl-1.2-0
-  http://www.opkg.org/packages/fourier_1.0_arm.ipk
+  http://www.opkg.org/packages/fourier_1.1_arm.ipk
-===Troubleshooting===
-If you only get a black screen with the white update line running down, it is very likely that the mixer is not setup correctly to use the built-in microphone of the FreeRunner. In this case, you can try to load capturehandset.state via alsa (alsactl -f capturehandset.state restore). It is possible that you already have the file on your device.
 [[Category:Audio Applications]]