Tag Archives: Audio

Basic Room Correction for your Speakers

frequencyIn this short tutorial, I’d like to explain a simple but effective method to achieve basic room correction when using a Windows computer as playback source.
Basically, several filters are applied to the digital audio signal before it is forwarded to the amplifier and speakers to “ameliorate unfavorable effects of a room’s acoustics”. This can sigificantly reduce or even elimiate unwanted vibrations due to bass, improves the overall listing experience and even reduces the amount of sound that is emitted through the walls.

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JBL Synchros S500 Headphones


The JBL Synchros S500 are closed over-ear headphones. They can be used together with any device with a 3.5mm audio jack, no preamplifier required. One particularly nice feature is the integrated digital signal processor to improve the audio quality, which can be activated on demand (requires batteries).
I was able to pick these headphones up for just 80 bucks, a bargain when you consider the steep MSRP of 280$! Let’s have a look what they have to offer.

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AV receiver audio modes


Dolby, THX, DTS, … which format is the best? What’s the difference?

If you have an AV receiver (AVR), then you probably know that it supports many different audio modes. At first sight, it seems a little overwhelming. I will briefly explain the different modes and give you some basic recommendations. To keep it simple, I will not go into too much detail.

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The ultimate media player for 60€


I’ve been using a Raspberry Pi 2 and a Blu-Ray player to play movies and music in my home cinema. Recently, I found that those devices can’t play everything. Specifically, they fail to play files that are encoded with HEVC (H.265) or videos in 4k resolution (UHD 2160p). So I decided to look for a new media player, one that could handle all kinds of files… and doesn’t cost more than 100 bucks.
This article consists of the following subsections:

  • hardware selection
  • software selection
  • installation
  • configuration

Ok, let’s get started!

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Denon PMA-50 Stereo Amplifier


I have been using a cheap (20€) amplifier board for some time now and somehow felt that the audio quality was lacking.
So I once again looked around what the market has to offer in this department. Precisely, I was looking for a HiFi stereo amplifier to drive my passive 6-ohm speakers (Dali Zensor 1) in my bedroom. Due to space limitations, one of the main requirements for the amp was size: I wanted something small, not a typical huge brick of an amplifier (let’s say no more than 30cm width).

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How To: Room correction for Stereo Speakers with a DSP

_mg_0561In this article I am going to show you how to leverage a digital signal processor (DSP) to add room correction to your stereo or 2.1 speaker system.

Here’s what you are going to need:

  • a DSP (e.g. the MiniDSP 2×4 with a plugin)
  • a measurement microphone (e.g. the MiniDSP UMIK-1)
  • 2x stereo audio cinch cables (or 3x if you have a subwoofer)
  • REW software installed on a computer

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How To: HiFi Network audio receiver for 50€


Let’s assume you have a nice set of speakers, but your amplifier doesn’t have any network features. In this article I’d like to show you how you can add network features such as Upnp/DLNA playback to an arbitrary amplifier, an analog input is the only requirement.
This will allow you to select music from your digital collection directly from your smartphone to play it back on your speakers in hifi quality.
The best thing about it: It will cost you only 50€!

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