Digital Audio Processing notes - from basics to who knows

http://en.wikipedia.org/wiki/Amplifier - basically wanted to check why gain can't be increased to infinity without affecting the information in audio(quality).
The gain of an amplifier is the ratio of output to input power or amplitude, and is usually measured in decibels.
The bandwidth of an amplifier is the range of frequencies for which the amplifier gives "satisfactory performance". The definition of "satisfactory performance" may be different for different applications. However, a common and well-accepted metric is the half power points (i.e. frequency where the power goes down by half its peak value) on the output vs. frequency curve.
In ultra high fidelity amplifier design, the amp's frequency response should extend considerably beyond this (one or more octaves either side) and might have −3 dB points < 10 and > 65 kHz.
Professional touring amplifiers often have input and/or output filtering to sharply limit frequency response beyond 20 Hz-20 kHz; too much of the amplifier's potential output power would otherwise be wasted on infrasonic and ultrasonic frequencies, and the danger of AM radio interference would increase. 
Modern switching amplifiers need steep low pass filtering at the output to get rid of high frequency switching noise and harmonics.
Efficiency is a measure of how much of the power source is usefully applied to the amplifier's output.
Commercially available Class D switching amplifiers have reported efficiencies as high as 90%.
An ideal amplifier would be a totally linear device, but real amplifiers are only linear within limits.
When the signal drive to the amplifier is increased, the output also increases until a point is reached where some part of the amplifier becomes saturated and cannot produce any more output; this is called clipping, and results in distortion.
Noise is an undesirable but inevitable product of the electronic devices and components


http://en.wikipedia.org/wiki/Switching_amplifier - A Class D amplifier or switching amplifier is an electronic amplifier where all power devices (usually MOSFETs) are operated as binary switches. They are either fully on or fully off. Ideally, zero time is spent transitioning between those two states.


http://www.audiosonica.com/en/course/post/2/Index- cool. got it from wikiversity. study sound effects concepts from here.
http://en.wikiversity.org/wiki/Getting_started_with_sound_recording
http://en.wikiaudio.org/Main_Page - on it.
http://en.wikibooks.org/wiki/Reaktor/Links/DSP
http://www.musicdsp.org/showmany.php -source codes :))) couldn't be better
http://www.digitalfilter.com/enindex.html
search "digital audio processing" on wikibooks
http://www.halfbakery.com/idea/Noise_20Cancelling_20Voice_20Amplifier -One would not want these voice wavelengths amplified, for fear of deafening the user by amplifiying noise components (eg: cymbals) which happened to be in that wavelength as well. The NCVA improves the signal of voice sounds by adding a low background of white noise at these same voice frequencies. This will not make voices louder, but will make them sharper. That's stochastic resonance.

http://www.freepatentsonline.com/4506379.html
http://www.freepatentsonline.com/4506379.pdf

http://members.misty.com/don/hivoice.html -interesting.How to Get More Apparent Voice Audio Power with Less Amplifier Power! Some about some "formants"
http://www.cs.cmu.edu/~music/icm/slides/week_10.pdf -Introduction to Computer Music. Week 10 - The Human Voice. More "formants"
http://users.otenet.gr/~athsam/speetch_filter.htm -for electronicians

IMPORTANT:Avoid BaseAdapter.getview() for all unchanged data items. HowTo: ListView, Adapter, getView and different list items’ layouts in one ListView

http://android.amberfog.com/?p=296

Couchdb resources

http://wiki.apache.org/couchdb/Introduction_to_CouchDB_views
http://wiki.apache.org/couchdb/HTTP_view_API
http://guide.couchdb.org/draft
http://wiki.apache.org/couchdb/EntityRelationship
http://wiki.apache.org/couchdb/HTTP_Document_API

Audacity: setup source- visual studio

First things first- install wxWidgets
http://wiki.wxwidgets.org/Downloading_and_installing_wxWidgets- its just about the env var "WXWIN"
http://wiki.wxwidgets.org/Microsoft_Visual_C%2B%2B_Guide

Audacity: Noise removal

http://wiki.audacityteam.org/wiki/HowAudacityWorks#Noise_Removal - check out the section on tinkling effects

JAVA performance measurement- An effective and the most complicated tool ever :P

ANSWER:- A Stopwatch that hardly ticks.
http://java.sun.com/docs/books/performance/1st_edition/html/JPMeasurement.fm.html

Works great though.

JAVA JNI monitors

http://java.sun.com/docs/books/jni/html/other.html

advanced stuff- android in industrial automation

http://android.serverbox.ch/

Android audio

http://tunepal.wordpress.com/2010/06/19/i-did-something-very-clever-today/  - FFT native Vz Java

http://www.androidzoom.com/android_applications/multimedia/jasuto-modular-synthesizer_gxvh.html?p=10

http://android.serverbox.ch/ - Cool

Android Embedded activity

http://www.mail-archive.com/android-beginners@googlegroups.com/msg15982.html

http://markmail.org/message/b3zfvuw7klgnz7f2 - condition for permission to embed

http://code.google.com/p/android/issues/detail?id=8818 - mem leak in localactivity manager. Status to be verified.

Audio concepts tutorial- Onset detection

http://apistudios.com/hosted/marzec/badlogic/wordpress/?cat=18