Tonochi's Audio Room II

The measuring instruments Tonochi owns and uses are introduced here.
Most of them are for amateurs and reasonably priced.

Please see this PDF for details.
[Measuring Instruments]

My measurement method is slightly different from the industrial standards.
The main reason is that my measuring instruments are not as accurate as professional ones. By and large, the measurements here on this website are less accurate than those of audio manufacturers.

My purpose of measurement is confirming normal operation of my works and searching for defects and shortcomings in my works. I don't intend to compare my measurements with those of commercial products or works of other audiophiles. Please be aware of this.

Meanwhile, as for the data I place importance on, I've set the measurement conditions stricter than the industrial standards. For such data, measured data of a manufacturer's amplifier are sometimes worse than those on its catalog, when the measurement is made according to Tonochi Method.

Please see this PDF for details.
[Measurement Methods]

The audio related PC application programs used by Tonochi are introduced here.
Every one of them is either free software or one bundled with a hardware product.

I think it is a good era for DIYers because you can get all the software necessary for audio for free of charge. Now that tools and measuring instruments has become cheap, we live in a good environment for DIY audio.

Please see this PDF for details.
[PC Software]

Soldering is an indispensable work in the world of DIY audio. Good or bad of soldering is directly connected to sound quality. Especially in DIY amplifiers, I believe quality of soldering affects sound quality more than circuit design.

Here I will introduce my unique soldering technique.
It has durability that does not deteriorate semipermanently and good sound quality.

Please see this PDF for details.
[Soldering Technique]

[2022/01/05] {Tonochi's soldering technique has been updated}

Tonochi's unique method of vinyl disc maintenance is introduced here.
Originally, it's not my original idea; it is a method that combines that of Mr. Tetsuo Nagaoka with one introduced to MJ magazine many years ago. And I added my own idea to it. This method is characterized by not using any goods sold at audio shops or cleaning agents. After completing the care, nothing remains in the sound groove. Once you've cleaned a disc this way, you can use it for about 15 to 20 years without maintenance.

I've forgotten the name of the person who wrote to MJ magazine. I'm sorry.

Please see this PDF for details.
[Vinyl Disc Maintenance]

In this document (PDF), the comparison by listening to two DSD recordings that were recorded before and after the disc cleaning is described. The links below are MP3 files (320kbps) that were converted from the DSD recordings. It may be hard to discriminate between the two in sound quality, but easy about the crackle noise.
Later, the crackle noise was sucessfully removed. For details, please refer to the PDF.
[Before][After]