equalizer

can I use AVAudioPlayer to make an equalizer player?

由 天涯浪子 提交于 2019-12-12 01:29:01
问题 I want to make an equalizer for music player,which can do some EQ setting like bass and treble,and I want to change the music effect by setting the frequency. 250Hz , 1000Hz , 16000Hz . (void)setEQ:(@"250Hz"); (void)setEQ:(@"1000Hz z"); (void)setEQ:(@"16000Hz"); But I can not find any API of AVAudioPlayer to set frequency.Can anyone help me? I will be very grateful. 回答1: i think AVAudioplayer is not support for Equalizer Effect, for this you need to apply bands for all audio units but by

Caused by: java.lang.RuntimeException: Cannot initialize effect engine for type: 0bed4300-ddd6-11db-8f34-0002a5d5c51b Error: -3

由 我只是一个虾纸丫 提交于 2019-12-11 09:52:12
问题 I am testing equalizer in my Android Version 7.1.1 but it shows a Runtime Exception but It's perfectly working on below version 7.0. When I try to initialize equalizer : private static UUID EQUALIZER_UUID; mp = MediaPlayer.create(this, R.raw.a); mp.start(); if(hasEqualizer()) { equalizer = new Equalizer(0, mp.getAudioSessionId()); equalizer = equalizerUtil.getEqualizer(mp); Log.d("No. of Presets",String.valueOf(equalizer.getNumberOfPresets())); } public static boolean hasEqualizer() { for

How can I sample an audio stream on iOS for visualization regardless of the audio source?

由 ≯℡__Kan透↙ 提交于 2019-12-11 05:14:05
问题 I'm interested in creating an iOS audio visualizer, not one that uses AVPlayer or any other similar derivatives, but one that is able to parse through an audio signal and create an audio visualization regardless of the application that is playing it. For instance, if Spotify is playing, or iTunes is playing. From whatI understand, you don't have access to that stream pragmatically unless the application specifically allows it. Another approach I was thinking of was to use the microphone, but

How to modify FFT result to equalize a music sample

由 ╄→尐↘猪︶ㄣ 提交于 2019-12-11 02:44:43
问题 I need to equalize a music sample by modifying the FFT result. I know how to obtain the frequencies of each of the output imaginary numbers, the problem is modifying this values to obtain an "equalizer effect". I need to know how to scale this values. The size of the entry is 4096 samples, and the sample rate is 44100 HZ Thanks in Advance Alex 回答1: You just need to scale the frequency domain bins. Note that these are complex values which you need to multiply by a scalar value, so you need to

Android - Equalizer usePreset not working (No change in sound effect)

由 痞子三分冷 提交于 2019-12-10 16:18:11
问题 I am working on streaming radio application. everything is working fine except the changing the equalizer effect does not affect sound. Changing the equalizer effect by calling usePreset(preset) does not make any changes in the sound effects. Even though there is no error, why usePreset does not change the sound effects. I have tested in samsung galaxy sII with 4.0.3. public void startPlayer() { // // Check whether we can acquire the audio focus // to start the player // if (

Audio Equalizer in Ruby

由 怎甘沉沦 提交于 2019-12-10 10:54:52
问题 I am working (well, playing...) in ruby, attempting to create some useful audio tools. Not anything live, not something like a midi synthesizer or live action filters or an mp3 player. What I am making are simple tools that open a .wav file, modify it, and save it. I have good generators (square, sine, noise, triangular, sawtooth, etc... and more!). I have an envelope filter with which I am comfortable. I have a good tremolo (automatic envelope filter). The closest thing I have to a low-pass,

UnsupportedOperationException AudioEffect: invalid parameter operation

由 吃可爱长大的小学妹 提交于 2019-12-08 18:47:56
问题 I'm getting an UnsupportedOperationException error on an equalizer on this line of code. bassBoost.setStrength((short) bassBoostPos); Here's the code equalizer = new Equalizer(0, 0); if (equalizer != null) { equalizer.setEnabled (isEqualizer); numBands = equalizer.getNumberOfBands(); short r[] = equalizer.getBandLevelRange(); minLevel = r[0]; maxLevel = r[1]; bassBoost = new BassBoost (0, 0); if(bassBoost != null) { bassBoost.setEnabled(bassBoostPos > 0 ? true : false); bassBoost.setStrength(

Audio Equalizer in Ruby

由 谁说我不能喝 提交于 2019-12-06 11:34:26
I am working (well, playing...) in ruby, attempting to create some useful audio tools. Not anything live, not something like a midi synthesizer or live action filters or an mp3 player. What I am making are simple tools that open a .wav file, modify it, and save it. I have good generators (square, sine, noise, triangular, sawtooth, etc... and more!). I have an envelope filter with which I am comfortable. I have a good tremolo (automatic envelope filter). The closest thing I have to a low-pass, high-pass or parametric equalizer is a tremolo that runs into the audio range... basically turning the

How to implement Equalizer in android

由 旧巷老猫 提交于 2019-12-06 06:23:13
问题 I have to implement an Equalizer in android and i also find source code here But i have no idea about NumberOfBands and BandLevelRange(What are they?) and how can i handle them. the given code i have shown you is from the source code i mentioned. eq = new Equalizer(0, 0); if (eq != null) { eq.setEnabled(true); int num_bands = eq.getNumberOfBands(); num_sliders = num_bands; short r[] = eq.getBandLevelRange(); min_level = r[0]; max_level = r[1]; for (int i = 0; i < num_sliders && i < MAX

Android: Equalizer - getNumberOfBands()

由 不问归期 提交于 2019-12-06 03:09:28
问题 According with http://developer.android.com/reference/android/media/audiofx/Equalizer.html#getNumberOfBands(), we can see the description of method getNumberOfBands() - Gets the number of frequency bands supported by the Equalizer engine . Do this depend of device or android version??? Thanks. 回答1: I guess it most probably depends on Device . 回答2: Frequency depends on hardware So according to my knowledge it must depend on Device. And you can also test(check) it by upgrading your phone. test
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