Choosing Between Single-Channel and Multi-Channel Codecs

What Broadcasters Need to Know About Audio Codec Selection

When designing a reliable broadcast infrastructure, one of the key decisions is whether to use a single-channel or multi-channel audio codec. This choice can significantly affect your operational flexibility, cost-efficiency, and long-term scalability. In this article, we break down the pros and cons of each type to help you choose the right solution for your network.

What Are Audio Codecs?

An audio codec is a device or software that encodes and decodes audio signals, typically for transmission over IP, satellite, or digital radio networks. Modern codecs support a range of formats—like AAC, OPUS, MPEG Layer 2/3, and PCM—and can handle streaming protocols such as RTP, SIP, or Icecast.

The key difference lies in how many audio channels a device can manage simultaneously.

What Is a Single-Channel Codec?

A single-channel codec processes one audio stream at a time. These are ideal for:

  • Small stations with limited program feeds

  • Point-to-point studio-to-transmitter links (STL)

  • Backup systems or temporary setups

  • Applications where space or budget is tight

Example product: Tieline Bridge-IT II – Audio over IP Codec

What Is a Multi-Channel Codec?

A multi-channel codec can handle multiple streams (often 2 to 8 or more) simultaneously. These are well-suited for:

  • Regional or national broadcasters

  • Studio-to-studio (SSL) or centralised contribution networks

  • Multi-program DAB or FM distribution

  • Broadcasters needing redundancy and scalability

Example product: 2WCOM IP-4c – 4-Channel Audio Encoder/Decoder

Key Considerations When Choosing

1. Number of Audio Feeds

If you regularly transmit more than one program or need to combine multiple sources, a multi-channel solution will streamline your workflow and reduce hardware costs.

2. Redundancy and Reliability

Multi-channel codecs often come with dual power supplies, network failover, and SNMP monitoring—ideal for mission-critical environments.

3. Cost and Rack Space

Single-channel devices are cheaper and more compact. But as your needs grow, stacking them may cost more than an all-in-one multi-channel option.

4. Integration Needs

Do you require MADI, AES/EBU, GPIO, or SIP/EBU Tech 3326 compatibility? Multi-channel devices usually offer more interface options and routing control.

Still Not Sure? Ask the Experts

At Broadcasters Warehouse, we specialise in designing scalable IP audio solutions. Whether you’re building a full STL/SSL system or need help choosing the right codec, our team can help you match your use case with the right hardware.

Explore our full range of audio codecs here.