SoundTouch audio processing database initialization process profiling defines a variable SoundTouchm_SoundTouch; SoundTouch's derivation relation namely osamplepipe-processing oprocessor-SoundTouch (process [1]). Therefore, the base class paiosamplepipe is constructed first, and then the export oproces, then, SoundTouch is derived from kerberoprocessor.
Soundtouch audio processing database Initialization Process Analysis
Define a variable soundtouch m_soundtouch;
Derivation of soundtouch
Export osamplepipe-> export oprocessor-> soundtouch (process [1])
Therefore, first construct the base class kerberosamplepipe, then derive the kerberoprocessor, and then derive the
Soundtouch audio processing library is easy to use. After simple compilation, you can set the compiling environment. Take VC as an example.
Directly include the include path under the soundtouch directory, and then add the soundtouch directory in Lib.
And then add the header file and referenced Library to the header file of the Code. According to the macro _ debu
This articleArticleSummary of the project.
After a project was completed for a while, I encountered a lot of trouble in the process, but fortunately it was finally solved. Here is the summary of the project after the project, and we have encountered the same problem, I hope I can refer to it, but my memory may not be very good. If you have any questions in practice, please leave a message for me or go to weibo.com/yarinto find me.
To implement a sound change technology in iOS, and to be able
Soundtouch audio processing database source code analysis and algorithm extraction (3)
Soundtouch audio processing database Initialization Process Analysis 2Next to soundtouch audio processing database initialization processRelationship between the tdstretch class and the base class: Export osamplepipe-> export oprocessor-> tdstretchThe class tdstretch * ptdstret
A supplement to soundtouch construction process initialization.In the soundtouch constructor, we noticed that there is such a function calceffectiverateandtempo ()Soundtouch: soundtouch (){// Initialize rate transposer and tempo changer instancesPratetransposer = ratetransposer: newinstance ();Ptdstretch = tdstretch: n
SoundTouch variable speed algorithm is similar to Sola algorithm, a closer look only know is Wsola algorithm.Last week there was a need to apply this variable speed to live packet processing, somewhat similar to the WEBRTC NETEQ processing mechanism.Using SoundTouch directly, there are some problems:1. A normal, a variable speed, the middle will appear discontinuous, there is impact. or switching at differe
I have previously written an article "using the SoundTouch library in IOS to achieve sound changes ".
Finally, many of my friends posted on their blog that the code can run on the simulator and cannot run on a real machine. They have been busy some time ago, 2013 the rankings of good-looking American TV series do not have time to go through the code and check it out.
Today, I checked the root cause of the problem and passed the test on IPhone 4 (ios5.
http://yarin.blog.51cto.com/1130898/640398First download SoundTouch open Source Library, you can go to the official website to find, http://www.surina.net/soundtouch/.Here are a few of the main adjustments we want to make to modify the audio file:
msoundtouch.setsamplerate (samplerate); //Set the sampling frequency of the sound
Msoundtouch.setchannels (Channels); //Set the sound channel
M_soun
Soundtouch is an open-source audio processing library used to change the pace, tone, and playback rate of audio streams or audio files.
By adjusting the tempo, pitch, and playback rates, you can achieve sound changes similar to those of tomcats. The official explanations for these three parameters are as follows:
Tempo (time period): changes the speed and slowness of audio playback without affecting the sound tone.Pitch (key indicator): changes the
Implementation of tdstretch class
The soundtouch class member function putsamples (const sampletype * samples, uint nsamples) is implemented as follows. According to the analysis in the previous article, the rate is a ratio. If it is greater than 1, the speed is faster, in this case, the playback speed slows down.
......
# Ifndef prevent_click_at_rate_crossover
Else if (rate
{
// Transpose the rate down, output the transposed sound to tempo changer B
[num]: Pd_1 = (Len (lines[my_Count[num]]), Len (lines[my_count[num]+2]) get_pd_1.append (pd_1) pd_2 = (len (Lines[my_count[num]]), Len (lines[my_count[num]+1])) Get_pd_2.append (pd_2) for I_cos in range (len (get_pd_1)-1): For J_cos in Range (i_cos+1, Len (get_pd_1)): # Calculates the text cosine similarity test_sat_1.append (cos_dist (Get_pd_1[j_cos], Get_pd_1[i_co S])) Test_sat_2.append (Cos_dist (Get_pd_2[j_cos], Get_pd_2[i_cos]) # Calculates the mean of the cosine similarity get_mean_1 = Num
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