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Analog Audio

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Analog audio

JOHN KIM.
ALAMEDA, CA. Summer 2016.
Analog Audio: Turntables, the phono stage, and digitizing records.

 
 

This project documents my path in choosing a way to make digital recordings of vinyl records. My goal is to have a system for capturing in digital format some of the characteristics of records that people enjoy.  

The three basic steps for putting together a system to digitize records are: (1) choosing a turntable to play the record, (2) choosing a phono preamplifier to generate a standard line level audio signal, and (3) choosing an analog-to-digital converter to digitize the audio.  Each step will have an impact on the final digitized result, so buying an all-in-one product - even if you find a decent one - takes choices out of your hands.  

I walk through the process by putting a system for digitizing records together by: (1) rebuilding an idler-drive turntable and building a plinth for it, (2) building a tube-based phono preamplifier, and (3) choosing an analog-to-digital (A-to-D) converter.

 

STEP 1: rebuilding an idler-drive turntable

Part 1 of the project is the first step in this process -- "putting together" a turntable to play the records on.  See this post for more details.


step 2: building a tube-based phono preamplifier

Part 2 of the project is to build a tube-based phono preamp and line preamplifier. See the latest blog post for details.

Completed and being tested out!

The preamp, a DAC, and the Edirol analog-to-digital converter 


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step 3: choosing an a-to-d converter

Stay tuned...