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Audio Personal Computing

MacOS Software Defined Radio with GQRX and RTL-SDR

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.

Categories
Audio Personal Computing

Roon in a BHYVE

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.

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Audio Music Personal Computing

Home Networks for Streaming Audio

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.

Categories
Personal Computing Technology

UniFi Updates

A new switch, cloud key, and updated network video recorder joined the Dismal Manor UniFi stable this October. The Moocher checked firmware to discover that updating the core POE switch to the latest firmware required updating UniFi Controller. At that time, UniFi controller ran in a FreeNAS jail. So, the cheap intrepid Moocher tried to update UniFi controller in the jail. He quickly discovered he was in dependency hell. Find out how he got out after the jump.

Categories
Personal Computing

The Moocher’s New Printer

After many years of using a Canon Pixma printer, the Moocher decided that the time had come for its retirement. Like many things in computing, changing interface standards rather than aging led to its replacement.

Categories
Audio Music Personal Computing

Transferring CDs to FLAC on MacOS moocher style

The Moocher is a music collector with a growing CD and record collection. In this article, the moocher describes how he transfers CD to FLAC to play using Roon Labs Roon Player. We’ll look at the motivation behind FLAC, the tools used to turn a CD into FLAC encoded tracks, and how to get the tools.

Categories
Home automation Personal Computing Technology

GDS3710 Part 4: Opening the door

This is the 4th post in a series chronicling a small church’s experience with the Grandstream GDS3710 Door System. We like the product but the deployment has been like solving Rubik’s Cube. We found we had to do a lot of tinkering to get things working, something that shouldn’t happen with such a sophisticated product.

This article summarizes some of our lessons learned, particularly with regard to use of the keypad to enter PINS, the interpretation of the virtual number field and the various way the doors can be opened using the GDS3710.

Categories
Home automation Personal Computing Technology Web hacking

Further thoughts on the GDS3710

The Grandstream 3710 Door System provides a video intercom, security camera (its recordable using compatible NVRS), RFID reader, and door unlock control relay. The device has a contact input that can be used for an inside exit demand input and a second that can be used as a door status sensor input. And all of this for the price of a door controller from HID or AXIS.

This is a new device so it has a few rough edges. This post talks about the rough edges.

Categories
Personal Computing

If something can’t go wrong, it will anyway

About a year ago, the retired moocher decided it was time to retire a couple of elderly Drobo Gen 2 direct attached storage devices. After much research, the moocher undertook an orgie of parts ordering, skinned knuckles, and arcane incantations to produce a FreeNAS storage server with collateral duties for networking and media service. Then there was thunder. It wasn’t bad but freenas wouldn’t run. This post describes the recovery actions and reminds all to take a key precaution.

Categories
Audio Personal Computing

Roon Take 2

Abstract

Over the past several months, I fell in love with Roon, its ability to stream my digital music collection in pristine full definition audio, the Allmusic artist and album commentary, and Roon Radio, the ability to play other things from my library like what I had been listening too. Nothing offers this combination of features. Nothing appears to have the commercial traction of Roon.

This article serves several purposes. First, it is my working notes from rebuilding my Roon environment, an iohyve managed FreeNAS behave VM. Second, I offer this in the hopes that it might inspire others to home brew. This article is a bit advanced. You really need to have a year or two of Unix system integration experience to pull this off. It is not a character by character, click by click recipe to build a Roon Server.

Those who don’t have system integrator chops but want a quality music server should consider the Roon Nucleus described in Reference [4]. Roon has developed these robust system specifically for the music serving task. They have adequate storage and computing resources to run Roon Server and are designed not to sneak crud into your audio system over the USB ground. If you’d like a fancy panel with that, Bryston, Linn, Naim, and others, will make pretty metal for you.