Hello, audio enthusiasts! 🎛️ Ever wanted to send sound directly from one audio device to another without any fuss? Or maybe even send it to two outputs simultaneously, effectively creating a splitter? Well, look no further! We’re diving into the magic of two Java programs that handle audio like pros: AudioPassThrough and its beefed-up sibling, AudioPassThrough2Outputs. Both tools use the Java Sound API to connect audio devices seamlessly. Let’s jump in and see what each version can do!

AudioPassThrough: Simple Signal Passage

What It Does:

The original AudioPassThrough connects a single audio input device to an output device in real time. It’s a perfect tool for straightforward audio testing, live audio feeds, or routing sound from a mic or another input source directly to your speakers, headphones, or any audio output you desire.

Example Use Cases:

• Testing Audio Configurations: Plug in an audio device, route it to your output, and ensure everything works smoothly.

• Live Sound Setup: Use it to monitor audio directly from a recording device during events or in a studio.

• Simple Audio Feed: Want to send audio from a digital player to an amp or a sound system without additional hardware? This tool lets you pass the sound through easily.

How to Use It:

1. Running the Program: Start with the command:

java -jar AudioPassThrough.jar

2. Parameters:

• <inputDeviceName>: The name of your audio input device (e.g., “Microphone”).

• <outputDeviceName>: The name of your audio output device (e.g., “Speakers”).

3. Options:

• -h: Displays available input and output devices.

For example, to pass audio from “Microphone” to “Speakers”, you’d run:

java -jar AudioPassThrough.jar "Microphone" "Speakers"

AudioPassThrough2Outputs: Splitting Made Easy

What It Does:

The AudioPassThrough2Outputs takes the original concept and doubles the output. Not only does it connect an input to one output device—it connects the same input to two output devices simultaneously. Think of it as a software audio splitter! This can be super handy if you want to monitor sound in two places at once or send audio to two different systems.

Example Use Cases:

• Monitoring in Two Locations: Send live audio to both a speaker system and a headphone set simultaneously for dual monitoring.

• Splitting Signal for Redundancy: Route sound to two different devices in case one fails.

• Multi-Device Testing: Test audio quality across two outputs at the same time, perfect for audio engineers setting up a multi-output environment.

How to Use It:

1. Running the Program: Start with the command:

java -jar AudioPassThrough2Outputs.jar

2. Parameters:

• <inputDeviceName>: The audio input device.

• <outputDeviceName1>: The first audio output device.

• <outputDeviceName2>: The second audio output device.

3. Options:

• -h: Displays available input and output devices.

For example, if you wanted to pass audio from “Mixer” to both “Speakers” and “Headphones,” you’d run:

java -jar AudioPassThrough2Outputs.jar "Mixer" "Speakers" "Headphones"

Technical Tidbits

Both versions use a few Java Sound API tricks:

• DataLine and Mixer: The programs identify input and output devices through these Java Sound interfaces, allowing for flexibility in audio device selection.

• Buffer Management: A buffer smooths out audio transfers by handling audio frames in chunks.

• Pop Prevention: Both programs ignore the initial audio samples for two seconds to prevent annoying audio “pops” when starting the pass-through.

Ready to Start?

These two versions of AudioPassThrough give you everything you need for custom audio routing. Whether you’re a sound engineer, musician, or hobbyist, these tools help you connect, test, and split sound easily!

The two versions can be downloaded for free from our FaceBook group