Tag Archives: DIY audio project

Do It Yourself audio: Jecklin/Schneider disc!

11 Jan

First of all, happy new year for everyone! Hope everything’s going fine for you. It has been┬áhectic back in Spain for holidays those last weeks, seeing friends and enjoying time as much as I could but also working my ass off to prepare University assignments for the next 2 weeks. I guess it’s time to get to it…

One of the things that I had left for when I was back home was recording my fellow friends and bandmembers of Sweet Q playing in our rehearsal room. And not recording them in the usual way, but in Surround! I’ll have to bring that tracks back to Salford University’s studios and produce a 5.1 mix where I can recreate the room so a listener can feel like he or she is just there listening them play. More technical details on the recording process and technique will come in the next post, in a few days.

While I was doodling about which microphone technique to use for the surround recording, I came to remember something that I always wanted to try and do myself: construct a Jecklin disc with my own materials! Let’s go to the first stop: what’s a Jecklin disc?

As it name says, it is just a disc that is placed between two separated microphones to recreate a natural stereo image that is convincing both when listening in headphones and in loudspeakers. It does so because it is a baffle, made of acoustically absorbent material that creates a shadow area at high frequencies between those microphones, such in a way that recreates more or less accurately the amplitude, time-difference and frequency response between the ears. Low frequencies don’t represent an obstacle to the disc due to their large wavelengths so they reach both microphones more or less at the same time. Difference comes with high frequencies: the disc is an obstacle to them, so that the sound source becomes directional at that point and one of the pair of microphones will capture it before the sound wave arrives to the other one, giving us the idea of localization of the source. Continue reading

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