Sidetone | A little app to provide sidetone in headphones | Audio Utils library
kandi X-RAY | Sidetone Summary
kandi X-RAY | Sidetone Summary
"Sidetone" is the sound of your voice in a mic, reproduced in your headphones or the earpiece of a telephone handset. It lets you know the mic is working and makes your voice less muffled, so you speak at a normal volume.
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Top functions reviewed by kandi - BETA
- Called when the combox changes
- Connects the input devices
- Disconnect all devices
- Set the volume
- Called when a close event is clicked
- Called when the device has changed
- Changes the volume
- Mute the volume
- Initializes resources
Sidetone Key Features
Sidetone Examples and Code Snippets
Community Discussions
Trending Discussions on Sidetone
QUESTION
Every now and them I would come across this in the ruby on rails ecosystem:
...ANSWER
Answered 2018-Sep-26 at 23:55Service objects are for things that don't fit well in the normal MVC paradigm. They're typically for business logic that would otherwise make your models or controllers too fat. Typically they have no state (that's held in a model) and do things like speak to APIs or other business logic. Service objects let you keep your models thin and focused, and each service object is also thin and focused on doing one thing.
Rails Service Objects: A Comprehensive Guide has examples of using service objects to manage talking to Twitter, or encapsulating complex database transactions which might cross multiple models.
Service Objects in Ruby on Rails…and you shows creating a service object to manage the new user registration process.
The EngineYard blog posted Using Services to Keep Your Rails Controllers Clean and DRY with an example of a service object which does credit card processing.
If you're looking for the origins, Service objects in Rails will help you design clean and maintainable code. Here's how. is from 2014 when they were coming on the scene.
Services has the benefit of concentrating the core logic of the application in a separate object, instead of scattering it around controllers and models.
The common characteristic among all services is their lifecycle:
- accept input
- perform work
- return result
If this sounds an awful lot like what a function does, you're right! They even go so far as to recommend using call
as the public method name on the service, just like a Proc. You can think of service objects as a way to name and organize what would otherwise be a big subroutine.
Anatomy of a Rails Service Object addresses the difference between a service object and a concern. It covers the advantages a service object has over modules. It goes into some detail about what makes a good service object including...
- Do not store state
- Use instance methods, not class methods
- There should be very few public methods
- Method parameters should be value objects, either to be operated on or needed as input
- Methods should return rich result objects and not booleans
- Dependent service objects should be accessible via private methods, and created either in the constructor or lazily
For example, if you have an application which subscribes users to lists that might be three models: User, List, Subscription.
QUESTION
For my current project I'm implementing a native library in C++ that I'll be accessing via JNA, this project is a low-latency communication simulator. There's a requirement to enable sidetone while transmitting in order to mimic the hardware the simulator is based on. Of course JAVA sound is proving difficult to achieve near-zero latency (best we can get is ~120ms), in order to remain comprehensible we need the latency on sidetone to be near-zero. Fortunately it seems that in Windows there's a method to listen to the usb headset's microphone which produces perfect sidetone.
Audio Properties -> Playback -> Headset Earphone -> Properties -> Levels
An example of what I mean here
(Note that this is different from the 'listen to this device' feature which produces a pretty bad delay)
I've been working with the MSDN examples for the Core Audio API's and am able to query devices and get their channels, volume levels, mute setting, etc. but the microphone level mute/unmute doesn't seem to be accessible from even the core audio apis.
My question is this: is there a way to programmatically interface with a usb headset's microphone level/mute setting?
Our simulators are standardized so we don't have to worry about supporting a wide range of headsets (2 at the moment).
...ANSWER
Answered 2017-Apr-20 at 15:27The key to solving this problem was to walk the device topology tree backwards until I found the part responsible for setting the sidetone mute attribute. So in my CPP project I had several methods working together to determine where I was in the topology tree looking for a SuperMix
part.
SuperMix
seems to be a common name for sidetone and is at least used by the two headsets we support. The tree is identical for both headsets, your mileage may vary. This is what the output may look like from the aforementioned WalkTreeBackwardsFromPart example (see this answer)
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