eureka mastering


Eureka Mastering provides professional audio mastering services. The studio is located in Portland, OR and is owned and operated by Mike Nolte, who has worked with many independent artists and record labels for more than 10 years. Equipped with a carefully curated selection of rich, velvety NOS tube processing and precision solid state electronics, Eureka Mastering can enhance your project with everything from classic vintage to fast and clean modern mastering. Eureka Mastering is an Apple certified Mastered for iTunes provider.

We are looking forward to working with you! Please contact us with your project details!


digital / cd mastering

1 song($100), 2-4 songs($75/ea), 5-8 songs($70/ea), 9 or more($65/ea) Optimized mastering for CD and WAVE uncompressed format.

vinyl premasters

12" ($100), 10"($50), 7"($30) Specially prepared high resolution files for delivery to the lacquer cutter or vinyl manufacturer. One file for each side of the record with a cut sheet.

additional instrumental masters

$10 extra per song If you have instrumental mixes that are the same as your regular mixes without vocals, and provided at the same time as the main mixes.

mastered for iTunes / Apple Digital Masters

$10 extra per song Optimization of mastering for Apple Music / Apple Digital Masters. Masters are delivered to your distributor or label in a hi res format that has been tested with tools from apple to make sure there are no "overs" causing clipping after being converted to their Apple Codec format.


  • Magix Sequoia 15

  • Egglestonworks Andra Speakers

  • SPL DMC Console

  • Sontec MES-432d9 Equalizer

  • SPL PQ - 2050 Equalizer Mastering Edition

  • SPL Gemini Mid / Side Processing

  • Pacific Microsonics Model Two ADDA

  • Lavry Savitr Analog to Digital Converter

  • Lavry Quintessence Digital to Analog Converter

  • Bricasti M21 Digital to Analog Converter

  • Fairman TMC Tube Limiter

  • Weiss DS1MK3 Digital Compressor Limiter

  • Waves L2 Ultramaximizer Hardware Version

  • Merging HAPI

  • Crookwood VU Metering

  • Pass Labs 350.5 Amplifier

  • Acoustic Zen Absolute Speaker Cables

  • Shunyata Everest Power Conditioning