Category: Audio

Audio

Digital Recording of House of Worship Services

Post author By davehamby
Post date June 28, 2019

This is the first of a series of articles about contemporary digital recording practice in a volunteer church service recording context. The advent of digital mixers and digital audio workstations has completely changed this game allowing a patient amateur to make a clean pleasing service recording for distribution to shut-in and traveling members.

Those wishing to learn more about copyright in house of worship program production are advised to see reference 1 for a complete discussion. Copyright law specifically exempts houses of worship from royalty payments for material performed or presented as part of a worship service proper. Houses of worship are required to pay royalties for non-worship use of copyrighted material not in the public domain. For this reason, we distribute service recordings to members on physical media and include only material copyright by the church or our speaker in our weekly sermon podcast that is publicly available.

After the break, we’ll talk about track capture off of a digital mixer. Although not hard, each mixer has its quirks and limitations so our intent here is to alert you to typical challenges and limitations rather than to provide switchology for a specific mixer or mixer family.

Music Discovery in the 21st Century

Post author By davehamby
Post date April 8, 2019

Are streaming services evil? For some. For others, they are the gateway to new artists, concerts, and record purchases. Audiophiles that have made the leap are in this latter camp. There’s more to life than the next Beatles reissue. Read on to learn how Roon, Qobuz, and Tidal combine synergisticly to promote artists and music. Roon 1.6 Radio is the secret.

Audio Personal Computing

Allo Digione gets a Face

Post author By davehamby
Post date April 4, 2019

John Darko of Darko.Audio fame asked what you hide your Raspberry Pi based audio player behind. That got me thinking. Give it a face like a Bryston Audio BDP-Pi player. Could that be done?

John was a fan of the RoPieee Linux plus Roon Bridge distribution so I gave RoPieee a try. In reading the RoPieee installation notes, I noticed that it supported the Raspberry Pi 7 inch touchscreen display. Having one lying around, I decided to add it to the basic Signature One player.

As always with DIY, some assembly is required and it is not all in the fine manual. I was using my display with an Allo DigiOne Signature HAT assembly. This HAT blocks access to the GPIO power pins. Oops — what’s the work around. Keep reading after the break.

Audio Personal Computing

MacOS Software Defined Radio with GQRX and RTL-SDR

Post author By davehamby
Post date March 30, 2019

Radio, like most else, has gone digital. In the early days of digital signal processing, pioneers realized that many modulation and demodulation techniques could be performed by digital computation.

As computers became cheaper and faster and integrated circuits became cheaper and faster, it was inevitable that the guts of radio receivers and transmitters would be mostly digital and that computers would do much of what went on inside new radios.

This post will describe the initial exploration of GQRX and RTL-SDR here at Dismal Manor. Most of what is already written on the Internet neglects to mention a couple of details the Moocher learned the hard way. Find out what these are after the break.

Audio

Personal Audio on the Cheap

Post author By davehamby
Post date March 19, 2019

Much written about personal audio is written to separate the established audiophile from a few dollars to buy a new gadget. This article is written for a student using Spotify or iTunes with headphones on an existing laptop.How can you begin a personal audio system and what are your migration paths going forward.

Audio

Why Digital Audio Systems Upsample

Post author By davehamby
Post date February 19, 2019

Digital audio systems since the beginning have used elevated sampling rates for processing while down-sampling the product to 44.1 or 48 KHz sampling rates for storage and transmission. These design decisions are attempts to satisfy the requirements of the sampling theorem using easily implemented anti-aliasing filters and reconstruction filters.

Audio Personal Computing

Roon in a BHYVE

Post author By davehamby
Post date February 13, 2019

FreeNAS 11.2 has been out for a few weeks. After some time running Roon on a Ubuntu equipped 2009 Mac Mini, I decided I’d give Roon a try in a BHYVE VM on the new FreeNAS build. This note recounts the experience so far. As usual, both FreeNAS and Roon have their secrets and they interact.

Audio

Gumby is a good gumby

Post author By davehamby
Post date December 29, 2018

I’ll try to avoid the schiit puns as Gungnir Multibit (Gumby) arrived and is settled in my audio rack. Gumby is a good Gumby! Jason Stoddard and Mike Moffat founded Schiit about a decade ago to scratch their audio design itch. Schiit has an unusual philosophy and take on high fidelity audio equipment, that it exists to serve the love of music and not to be techno-sculpture in the lounges of the rich. Rather than making a big statement piece for the wealthy, they began by making affordable $100 devices for those wishing for more than headphones plugged into an iBook. And they set out to show that you could build here of mostly US made stuff and be profitable.

Audio Music Personal Computing

Home Networks for Streaming Audio

Post author By davehamby
Post date December 27, 2018

I’ve not written on audio and networking in a while but over the holiday I read Jason Stoddard’s Schiit Happens about his return to the high fidelity equipment industry as co-founder of Schiit, a maker of personal audio and value oriented high end audio. I found the book after I had ordered my Schiit Gungnir Multi-bit DAC. Over the break I had also watched a video in which Mike and Jason (the founders) talked about how Schiit came to be and this, that, and the other thing. They are toying with the notion of offering a new product which Mike kept calling Schiit Pi. This got me thinking I should write about my streaming environment again as I had improved it significantly in 2018.

Audio Music

Roon and Tidal

Post author By davehamby
Post date December 18, 2018

About a year ago I installed Roon Audio and began using it without Tidal. In my original configuration, Roon Audio ran in a VM hosted by my FreeNAS storage server. It delivered audio to either an Apple TV or a Google Chromecast Audio. Both were connected to a Cambridge DACmagic converter by TOSlink. For the first year I passed on the Tidal subscription, assuming that it, like Apple and Amazon streaming, sounded horrid. Then I got curious.