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Troubleshooting and fixing Android audio filter app (biquad filter).

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.

We have made a demo app that has some issues and we need help to solve this.

The app plays 44,1 kHz wav files. With the filter bypassed it sounds ok, but with the filter applied the sound is scrambled. We believe there is some faulty code and we need help to fix this.

We can provide ths source code (android studio project) for reference.

Below is a description of the filter.

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.

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

Kemahiran: Android, Mobile App Development, Java, Pengaturcaraan C, Matematik

Lihat lagi: ringtone audio app, multi channel streaming audio app android, android bluetooth audio app, android audio creation app, app android audio jack, android audio app, foscam app android audio, android audio loop app, android audio recording app, android audio mixer app, build android audio streaming app, android video app loop playback, incoming call auto answer mp3 audio app android, android audio sample app, android audio filter changer, android capture internal audio app, android audio dictionary app, fixing bugs mobile app(ios& android) and website development

Tentang Majikan:
( 2 ulasan ) Uppsala, Sweden

ID Projek: #21451773

40 pekerja bebas membida secara purata $533 untuk pekerjaan ini

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