Larix Broadcaster for iOS version 1.8.7 introduces FLAC audio support via Enhanced RTMP, giving mobile live production workflows a new option for preserving audio quality from the source.
FLAC, or Free Lossless Audio Codec, is designed to compress audio without losing the original signal quality. For most live streaming workflows, lossy codecs such as AAC are still the practical choice for final delivery to viewers. However, there are many production scenarios where the mobile encoder is not the final step. The stream may be received by a media server, processed, recorded, mixed, transcoded, or sent further into a broadcast pipeline.
This is where FLAC becomes especially useful.
With FLAC support in Larix Broadcaster, an iPhone or iPad can now act as a high-quality mobile contribution source while keeping the audio track lossless during ingest over Enhanced RTMP. This helps preserve more detail before any downstream processing or final distribution encoding takes place.
Live music and performance streaming
Live concerts, DJ sets, acoustic performances, theater productions, and other music-focused events are among the clearest use cases for FLAC.
In these workflows, audio is often just as important as video, and sometimes more important. When Larix Broadcaster is connected to an external audio interface (like mixer, or microphone setup via USB), FLAC allows the contribution stream to preserve the original sound more accurately before it reaches the production server.
The final public stream may still be encoded to AAC or another delivery codec, but the production side receives a cleaner source. This is valuable when the signal will be mixed, normalized, recorded, or repackaged later.
Studio-quality mobile contribution
FLAC support also helps teams that use iPhones or iPads as compact contribution devices in professional environments.
A mobile device running Larix Broadcaster can be used as a portable camera for interviews, press rooms, lectures, conferences, houses of worship, or on-location studio segments. When audio is captured from a proper external source via USB, FLAC over Enhanced RTMP gives the receiving workflow a lossless audio feed instead of introducing lossy compression at the first step.
This is especially useful when the mobile stream becomes part of a larger production with switching, replay, graphics, translation, captioning, or post-event editing.
Archiving and post-production
Some live streams are not only watched live. They are also recorded for future use.
For training sessions, performances, corporate events, educational content, religious services, and media production, the archived version may be just as important as the live output. FLAC helps preserve audio quality in recordings made on the receiving side, giving editors and producers better source material after the event.
A lossless contribution path can make a noticeable difference when the archive will later be edited, remastered, clipped for social media, or republished in another format.
Better source quality before transcoding
Every lossy encoding step can reduce quality. If audio is compressed once at contribution and then compressed again for playback, the result may accumulate artifacts, especially in music, applause, ambient sound, and speech with background noise.
Using FLAC at the ingest stage helps avoid unnecessary quality loss before the stream reaches the server. From there, operators can decide how to process and deliver the audio based on the target workflow.
For example, a production pipeline may receive FLAC from Larix Broadcaster, record the stream, and then create final outputs for HLS, DASH, SLDP, or other delivery formats. The key advantage is that the first mile from the mobile device to the production system can now preserve the audio signal without lossy compression.
Enhanced RTMP for modern audio workflows
Classic RTMP has been widely used in live streaming for many years, but modern production workflows often need codec options beyond the original RTMP feature set. Enhanced RTMP expands what RTMP-based workflows can carry while keeping the familiar ingest model that many operators already use.
By adding FLAC support via Enhanced RTMP, Larix Broadcaster gives mobile producers a practical way to combine familiar RTMP contribution with lossless audio transport.
E-RTMP in Nimble Streamer
Enhanced RTMP can be processed by Nimble Streamer software media server. It then can be processed further:
- Transcoded into any other audio codec.
- Delivered via SLDP low latency protocol for further playback in browsers.
Nimble Streamer is a key element for live audio processing and its further delivery.
Summary
FLAC support in Larix Broadcaster on iOS is a focused but important addition for audio-sensitive workflows. It is useful when preserving source quality matters, especially in live music, studio contribution, event production, archiving, and pipelines where the stream will be processed or transcoded downstream.
With Larix Broadcaster on iPhone or iPad, teams can now use Enhanced RTMP not only for mobile video contribution, but also for higher-quality audio ingest where the source signal deserves to be kept intact.