iOS and Android audio filter app (biquad filter)

We need implementation of an analog filter circuit into an app. The app will be a music player and the filter is an effect that can be applied upon pressing a button or clicking a symbol.

The app in the first iteration is for demo use only and it need to be able to play 44,1 kHz wav files with the filter bypassed and with the filter turned on.

System overview:

Each input channel (xr & xl) has to be filtered through two different transfer functions: H1(z) & H2(z).

The two output channels (yr & yl) are the sum of the outputs from each filter according to:

yr = xr*H1(z) + xl*H2(z)

yl = xl*H1(z) + xr*H2(z)

The original analogue filter has transfers functions with two poles and two zeros in the s-plane, hence those transfer functions can be transformed to the z-plane in a biquad-filter structure.

There is a rudimentary audio player app for android with a faulty filter implementation. We can provide ths source code for reference.

We will provide filter implementation as well as koefficients for 44,1 kHz playback.

Evner: Mobile App Development, Android, iPhone, Signal Processing, Audio Processing

Se mere: multi channel streaming audio app android, android bluetooth audio app, android audio creation app, port android phonegap app ios, ios android hybrid app, app android audio jack, android audio app, foscam app android audio, android audio loop app, android emoji app ios, ios bluetooth audio app, ios app image filter library, ios app able filter items based criterias, ios core audio playback volume, android audio recording app, ios android quiz app, ios android file app, android audio mixer app

Om arbejdsgiveren:
( 2 bedømmelser ) Uppsala, Sweden

Projekt ID: #20612054

42 freelancere byder i gennemsnit $529 på dette job


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