How to Remove Hum Using an Optical Cable

In the pursuit of pristine audio quality, enthusiasts and professionals alike constantly seek ways to eliminate noise and interference that can affect their listening experience. One effective solution that has gained popularity is the use of optical cables to connect streamers or PCs to Digital-to-Analog Converters (DACs). This approach can offer significant improvement over traditional connections, promising a cleaner sound. Here's how it works and why it might be the upgrade your audio setup needs.

The Culprit: Electrical Noise and Interference

Before delving into the solution, it's important to understand the problem. Audio setups, especially those involving multiple electronic devices, are susceptible to electrical noise and interference. This can manifest as an annoying hum or buzz overlaying the music. Sources of such disturbances include electromagnetic interference (EMI) from other devices, radio frequency interference (RFI), and ground loops, which occur when different components in an audio system have differing ground potentials.

Optical Cables: A Path to Purity

Optical cables, also known as Toslink cables (from Toshiba Link), offer a compelling solution. Unlike traditional coaxial or RCA cables that transmit audio signals electrically, optical cables use light to convey the signal from one component to another — in this case, from the streamer or PC to the DAC.

The Key Advantages:

Immunity to Electromagnetic Interference: Since optical cables transmit light rather than electrical signals, they are impervious to EMI and RFI. This means that the myriad electronic devices in your environment won't interfere with your audio signal.

Elimination of Ground Loops: Optical connections break the physical electrical connection between devices, effectively eliminating the potential for ground loops. This is a common issue with electrical connections where differing electrical grounds can introduce hum into the audio signal.

Simplicity and Compatibility: Modern audio equipment, including DACs, streamers, and PCs, often come with optical inputs and outputs, making it easy to integrate optical cables into existing setups.

Conclusion

In the quest for the cleanest, most immersive sound experience, optical cables can be a remarkably effective solution when hum hunting. By eliminating common sources of noise and interference, they allow the true quality of your music to shine through. Whether you're an audiophile, a professional, or simply someone who appreciates clear sound, considering the switch to an optical connection if you're experiencing hum might just bring a new level of purity to your audio experience.