Questions tagged [signal-processing]
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65 questions
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How does a feed-back compressor work, in technical terms?
In a feed-back compressor, the output signal is routed to the side-chain input.
This article on SOS states that as a result, the compressor is supposed to work "smoother", with however "...
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Strange clicking modulation in audio recorded with smartphone (m4a format)
My dad recently recorded a 3h long meeting with a smartphone app (I don't know the name, but I can ask him) and this app records in .m4a files.
The only significant sound in the ambiance were human ...
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Low microphone volume, even with phantom power enabled in my audio interface software
I'm experiencing an issue with my microphone and audio interface setup, where the microphone volume is too low, and I need to turn the input gain in my audio interface’s mixer software to the maximum ...
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Detect which microphone is spoken into
I have a couple (10 or so) microphone XLR inputs that goes into my analog mixer Allen & Heath PA20. The problem is that the channel inputs don't have a signal LED that lights up when someone ...
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Can a circuit designed for mono jacks work with stereo jacks?
I have some schematics for electric guitar pedals that are designed for a mono jack input and output, but I only have stereo jacks, and I want the pedals to work with stereo signals.
Can the same ...
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how to separate an audio file based on different speakers
I have a conversation recorded of 2 different people, the conversation contains a gap before every sentence or person to make it easier for the algorithm recorgnise the voice. I want to try to split ...
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Why is this audio obfuscation algorithm not working?
I'm the author of software that, among other things, records audio. I got the requirement that the audio should be encrypted or at least obfuscated before saving to disk, so that someone using ...
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Digitize vinyl on PC (TT > Stereo Amp > USB Audio Interface > PC recording software)
Never tried anything like this, so please excuse any inevitable incompetence!
I'm trying to rip vinyl records from my turntable to my computer. Here's the relevant (I think) equipment I've got:
JVC ...
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What is a Codec Input?
I have a Biamp Nexia VC DSP, which has a Codec input and output on the back.
The manual doesn't say anything more than: "This plug-in barrier strip connector provides a balanced input for line-level ...
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can you combine a high passed signal and low passed signal to get original signal
suppose you take a signal, and duplicate it, then apply a low pass and high pass filter both with the same frequency and roll-off respectively to each signal, then combine the two signals additively, ...
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Is it possible to change the frequency of an audio?
If I record myself singing, can I change the frequency of the audio signal that is generated and listen to it at any frequency? If so, how can I do that? Is there any software available?
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Can steady-state noise contain a fundamental frequency?
I am doing speech-in-noise testing. We use the so-called matrix test. The Flemish/Dutch version of this test features a female speaker. I ran some sentences through 'Praat' and it provided me with a ...
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Why do some audio amps use AC while others use DC
In particular I am looking at the JDS Labs Atom and the iFI iCan SE.
The iCan outputs a tremendous amount of power, 4 times that of the Atom, enough to drive speakers; But does so less cleanly, at-...
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Move high pitched sounds from left to right speaker
I'm deaf for high pitched sounds (above 6 KHz) in my left ear. This means when I'm listening to music with headphones I miss part of the percursive or higher harmonic sounds. If I try to balance the ...
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Is it legitimate to use a low pass filter on short segments of audio around stitch between two amplitude signals to remove noise?
I am trying to design a pipeline that will repeat a certain segment of audio N times (for instance, for 10s of input, repeat the segment from 3s to 5s four times). This generates unwanted high ...
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How to improve guitar tone for recording?
first post:
I've been recording/producing for 4-5 years but I've always struggled to get electric guitars to sound the way I want them and I'm wondering what I can do to improve that. (also done ...
user25471
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What's the easiest way to utilize the stereo tracks on my Zoom L-12 as microphone inputs?
I have a Zoom Livetrack L-12, and I'd like to to use the two stereo channels as individual microphone channels. Obviously, I will need a microphone preamp for each of these channels in order to do so.
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Is baffle-step compensation obsolete because of room correction?
When installing speakers in or on wall, are baffle-step correction circuits now unnecessary? Would there be any benefit to continuing designing speakers to compensate in the crossover, or is it ...
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What dBFS threshold should I set for differentiation between silence and NOT silence
I am trying to set a threshold in dBFS terms for the input audio from a smartphone (in this case Android), below which the application will demarcate it to be Silence within a case of User speech. ...
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Combining two clicky copies of the same record into one good recording
I have two copies of a Belgian 45 RPM single that are both rather clicky even after being washed. The pops occur throughout, stochastically, but occupy a small fraction of the overall time, such that ...
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Recording multiple microphones tightly synchronised
I would like to record sound from multiple microphones (at least 3) to a computer, tightly synchronised in time. This is for some research into signal processing.
Specifics of what I'm looking for:
...
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Time resolved sound measurment
I had a question about sound measurement in air using a B&K microphone. In the acquired time resolved sound measurement signal I can see both negative and positive voltages/ pressure values. I ...
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Quick and dirty demo creation for hearing loss presentation
What is a quick and dirty way to put in a filter and in two signals for a hearing loss presentation? I want to take a song, say an mp3 of Louis Armstrong's What a Wonderful World, and I want to add a ...
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What do you call someone who programs software for producing, reproducing or processing audio?
What type of education do these people usually have? I have heard that they need to understand circuits because a lot of the software is modeled after analog gear. I am currently in semester 2 of an ...
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Differentiate LIVE(REAL) and RECORDED voice [closed]
I am working on a project in which the system has to allow only the right person to access the vault. How can I make the system to understand and differentiate a recorded voice and a real human's ...
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Audio Signal Difference Extraction
I'm from visual arts background and so, I'm not familiar with technical aspects of sound design. But I'm exploring and learning everyday.
Currently, I'm working on a sound art project, for which I'd ...
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What you need to know to create a software synth?
Which areas of expertise do you need to know about to create a flexible software synth?
Signal processing? Sound engineering?
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Converting audio recording to numeric values representing how loud the audio is at a given time
Warning: Complete audio beginner
Background:
I have audio recordings that were recorded through a mobile device using an app. I need to write a program that takes the audio and finds periods of ...
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Mathematically what does phase reverse do on a signal?
In a stereo sound, phase reverse one channel and add it to another channel, we will cancel out those centered components.
Mathematically what does phase reverse do on a signal? Can you explain that ...
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How do I find the common audio between mp3 audio tracks?
I have a folder of nearly identical .MP3s, but each with a different voiceover mixed in.
I'm trying to dump the tracks without the voiceovers.
I've tried aligning two of them to the nearest sample, ...
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How to do frequency or spectral subtraction of two audio tracks?
I want to know how it's possible to substract one audio track from another. Meaning that you cut out the frequency spectrum of a audio file from another.
I know how the phase inversion trick used to ...
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Can a software generate a "midi" track from a song of musical notes of different instruments thanks to some filters? [closed]
Everybody knows those goofy special graphical effects generated by media player when you listen to a song. I never really liked them because they seem random and don't seem to synchronize with the ...
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What's the shortest sound perceptible to the human ear?
How long would the shortest perceptible sound last?
I'm guessing there'll be a frequency at which we can hear short sounds best but I don't need to find that. Admittedly this is also completely ...
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Selective amplification of a voice signal
In many TV programmes, the director is speaking to the show host via an ear-piece that the host is wearing, and at many instances, what is being said through that ear-piece is more or less audible ...
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i need a singer simulator or virtual singer?
i am going to generate artificial human voices like a singer
do you know a tool with such ability ?
like this
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Logic Pro Environment: Panning Signal Processing
I'm trying to send an arpeggiated audio signal (in logic pro 9) into separate signal streams to creating an automated, synchronised panning effect, in one stereo channel.
Problem 1:
The audio signal ...
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Ceiling speakers central switch
I have 16 2-way ceiling speakers (2-way speaker, RMS: 30W, Max: 60W, 8 Ohm
(coax, polypropylen membrane)) and I would like to have a box, to which I could connect them all and 1 (maybe more) input ...
PaN1C_Showt1Me
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How to create the muffled sound effect like hearing through walls?
I don't know what's the correct technical audio term for it. How do you create the sound effect to simulate hearing a sound source from far away through thick walls? Kinda like you would hear standing ...
xster
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Smoothing transitions between sound clips
Is there a tool that allows the smoothing of a digital audio signal? For example, if I have hundreds of very different short audio clips one after another and I want the transitions to be smooth so ...
Omer Eilam
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Highly Directional Close up Microphone
I would like to record specific audio for the following scenario. I have a piece of equipment that rotates a drum via an electric motor. The drum contains food product that is heated by air entering ...
ctilley79
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Vocal Disguise Effect
Any suggestions on how to achieve an "Anonymous Vocal Disguise" Effect?
Along the lines of: "Ransom Phone Calls" or "Anonymous TV Interviewee".
I haven't started to experiment yet, seems to be a bit ...
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how to remove sound clipping in existing record
I have an old record that has some clipping effect that happened during recording. This is a song, so i can't just cut out all frequencies probably ... is there any smarter way around to get rid of ...
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How do I capture or create first-person audio?
I was wondering how I might capture or create audio which sounds like it's being heard first-person. For example, there's a scene in Being John Malkovich where the viewer sees through Malcovich's ...
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Do I need an amplifier to listen to the signal audio coming from a DAC?
I'm planning to use a DAC (digital-analog converter) to convert signal from an optical/toslink connection (Apple TV) to my speakers with 3.5 analog jack.
I'm wondering if I need an amplifier or if I ...
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How to fix an audio-set with wrong levels
I have a set of 300 audios. I use those files in an App, as the voice of an animated character.
So, the thing is, that I can't find a process that take the audio, and "normalize" its levels to make a ...
Gonzalo Larralde
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How to amplify & clean up a weak reel-to-reel recording for converting to digital?
I am in the process of converting old reel-to-reel and cassette tape recordings to digital. One reel-to-recording from the early 70’s of my first band is real weak. When I amplify the sound the tape ...
Ron Free
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Which DSP / VST / AU / RTAS external units exists to offload audio processing from internal CPU? [closed]
I'm looking for a list of products that allows the user to install and run their own purchased VSTs, AU, RTAS or any other kind of audio plugin - on an external device dedicated for running virtual ...
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Raw Audio Edit Process
Hey everyone!
I've been trying to refine and improve my sound editing process/skills and have been working from Ric Viers 'L-I-S-T-E-N' process from 'The Sound Effects Bible' (pg 187 for those of you ...
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Removing tonality: antitune
What kind of processing would you apply to an audio track to remove its tonal quality (its pitch), leaving sound with the same texture as the original but ambiguous pitch? For example, a drum sound ...
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What's the difference between a vocoder and a harmonizer?
As a follow-up to this question: https://video.stackexchange.com/questions/351/what-is-the-difference-between-autotune-and-a-vocoder, let's get into the nitty-gritty about vocoders and harmonizers.
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