Replaced the insulator of YAMAHA analog record player GT-2000L.


Yamaha Analog Record Player GT-2000L.

This is a great piece of audio equipment in the golden age of audio that I continue to use with great care.

The weight of GT-2000L is quite heavy, about 28kg, and the genuine insulator was screaming under the weight of years of use.

The genuine insulators were made of rubber and spring composite structure, and they were strong enough to withstand more than 12kg of weight per insulator, even if they were replaced with 18kg gunmetal turntable "YGT-1".

Now, it's in such a mess!


Two of the four insulators were damaged, especially one where the rubber adhesive had completely peeled off and the enclosed spring had popped out.


YAMAHA didn't have any spare parts in stock, which is not surprising since the product was almost 40 years old.

I've been looking for it on the Internet auctions, but I couldn't find any genuine insulators, so I had no choice but to use other insulators.

Last year, I found interesting parts among all the junk, such as audio cables and radios, in an item called "Audio Junk Set" on online auction.

I decided to bid on it at a very low price, and when I checked what I received...


This was a set of four genuine insulators for GT-2000. This was truly a grab bag!

They were in very good condition with very little apparent deterioration, and had probably been installed in GT-2000 for a short period of time.


After disinfecting and cleaning with alcohol, it caused a blooming phenomenon of the rubber. So I applied a little bit of KURE rubber protectant, and it returned to its original black tint.


As a test, I tried to find out how much difference there was in the degree of shock absorption between the old insulator and the new insulator.
I put my iPhone SE2 on the turntable and used the vibration analysis app "Vibroscope" to measure the difference.

- Measurement result of vibration absorption at OLD insulator

- Measurement result of vibration absorption at NEW insulator

This measurement was made when the GT-2000L was placed on the YAMAHA GT-rack "GTR-1W" and the rack shelf was hit hard by hand intermittently. The results show that the new insulator dampens external vibrations better than the old one. I tried to apply the same force as much as possible, but it is difficult to apply exactly the same kind of vibration, so this was just for reference.

Now I can enjoy original sound of the GT-2000L for the first time in over a decade. I'm sure it will be fine for another 10 years or so.
posted by toons at 23:49 | Audio


New updated - "Magnetscape", "Magnetscape Lite" ver 4.0

icon-magnetscape_v400.png icon-magnetscape_lite_v400.png

"Magnetscape" and "Magnetscape Lite" have been updated to ver 4.0 today.

"Magnetscape" is a new measurement app that observe invisible magnetic fields by using a built-in iPhone magnetic sensor.

"Magnetscape Lite" is a free edition that is simplified "Magnetscape".

This app can monitor the surrounding magnetic field in real time, it can be used for various purposes in real life. For instance, it can be used for investigation of static magnetic field, search for low electromagnetic field at alternating magnetic field (electromagnetic field), metal detection and more.

In the latest version, we have updated the UI design and improved the internal processing for better stability.

mag_scope_1_v400.jpg mag_time_v400.jpg 


#Magenetscape Lite
maglite_scope_1_v400.jpg maglite_time_v400.jpg

More information about these apps can be found on AppStoreTM at the links below.


#Magenetscape Lite
posted by toons at 18:54 | News


New updated - "Vocal On Stave" ver 3.0


"Vocal On Stave" has been updated to ver 3.0 today.

"Vocal On Stave" gives you valuable visual feedback on your vocal pitch.

You just sing into the built-in microphone on your iPhone, and it graphs the estimated vocal pitch on the stave.

It will assist you visually for training your a cappella vocals and practice of Passaggio.

On sing a song, what recognize your pitch on scales? Working on scales is an important part of learning how to control your vocal, developing your voice and keeping your voicing in good shape.

Please use this app to improve the ability for your singing.

In the latest version, the UI design has been updated and the stability has been improved.

vos_1_v300.jpg vos_2_v300.jpg

Please to click the following link to view more information of this app on App StoreTM.

posted by toons at 23:59 | News


Happy New Year


Happy New Year. Cheers to a wonderful 2022!

posted by toons at 18:49 | diary


Information on season's holidays closure

We will be closed from 2021/12/29 to 2022/1/5 for the season's holiday.

Regarding inquiries received during the holidays, we will respond sequentially after the holidays. Thank you for your understanding.

Have a good new year !

posted by toons at 09:58 | News


New updated - "Audio Frequency Analyzer" ver 7.0


"Audio Frequency Analyzer" has been updated to ver 7.0 today!

"Audio Frequency Analyzer" is a powerful real-time audio analyzer (RTA) app for iPhone.

It is available in a variety of applications, such as sound room tuning, speaker settings, audio equipment testing, stage setting measurement, evaluation of sound mixing environment and Investigation of noise environment.

"Audio Frequency Analyzer" can measure the frequency response in 30 split band scale of 1/3 octave in realtime. Also it can be displayed the FFT analysis result.

# 1/3 octave band frequency response

# FFT analysis

In the latest version, we have renewed the UI design and added a new feature to change the slope of the FFT graph.

# FFT analysis - Slope OFF

# FFT analysis - Slope ON (3dB/oct, center frequency 1kHz)

Detailed information about this app is available on the AppStore and can be found at the following link.

posted by toons at 16:00 | News


Paco de Lucía


Today was the birthday of the great guitarist Paco de Lucía (Birth of December 21, 1947).

A genius who transcended the boundaries of flamenco and opened up new horizons in guitar music.

Whenever he came to Japan, I went to listen to his live concerts.

Speaking of live concerts, the super guitar trio with John McLaughlin and Al DiMeola in "Friday Night in San Francisco - Live" (1981) is famous, but I would like to mention "Live Under the Sky" (July 25, 1981, Denen Coliseum, Tokyo). I was particularly impressed by his performance with Chick Corea at this live. It was an unprecedented outdoor live performance in heavy rain.

When I received the sad news that he passed away on February 25, 2014 during a live tour in Mexico, I cried at his loss.

In his later years, he was playing guitar with the superb technique like his younger days, but I had admired his ever-evolving attitude and musicality.

The album entitled "Fuente y caudal" (1973) was the starting point of Paco's music for me. It was the beginning of Paco's creation of new music in the tradition of flamenco. If you have a chance, please listen to it.
posted by toons at 23:57 | Audio


Le marché de Noël 2021 in Kyoto


Yesterday, I went to the Christmas market, "Le marché de Noël 2021" in Kyoto.

In Japan since October, COVID-19 virus transmission has been kept very low, and events where people gather have been permitted.


It is held every year on the second weekend of December at "L' Institut français du Japon-Kansai Kyoto". The location is not far from the Hyakumanben intersection and surrounded by the facilities of Kyoto University.


Maybe it was already dusk, but less crowded than last year.


It was getting a little chilly, so I had a glass of Alsatian sparkling wine and a glass of hot wine, which made me feel very tipsy.


A percussion live performance by Steve Eto. It was a mysterious improvised music, but the heavy bass of the big hand drum was very pleasant.


I measured the frequency range of his music sound and found that the lowest frequency range was about 40-50 Hz, which was higher than I expected. After all, the sound of live drums seemed to rise quickly and resonate strongly.

I was able to fully enjoy the early Christmas feeling!
posted by toons at 23:53 | diary


The aftermath of the Amazon "AWS" system failure in my house!

There were something wrong with my smart home environment since this morning!

Alexa was not responding to my calls, and my SwitchBot which remotely controls my home electronics, was not responding at all!

I've been wondering if it might be because of the news that Amazon Web Services (AWS) is experiencing a major system failure in the East Coast area of the United States.

When I checked the SwitchBot support page, I found out that there was a system failure in AWS and that smart home appliance control is no longer available for all products. I had similar problems with AWS failures before.

SwitchBot support page: Apology for the system failure on Wednesday, December 8, and notice of recovery.
- Date of occurrence
 Cloud Service Abnormality: December 8, 2021, 2:37pm to 11:39am
 Server congestion period: December 8, 2021, 11:39 a.m. to 10:59 p.m
- Affected products: All products
- Faults that appeared: Devices went offline and could be remotely accessed.
 Device goes offline and cannot remotely control the device
 Display error 190
 SwitchBot scene does not run
 Unable to log in to account
 Failed to operate from Alexa, Google Assistant, Siri, IFTTT, or LINE Clover
- Cause of failure
 There was an anomaly in the Amazon Web Service (AWS) that we use, and the requests for the period of the anomaly were piling up, causing a large amount of access to be concentrated and the lines to be congested.
- Future measures
 We will consider improving the fault tolerance of our services through cloud services.

In addition to SwitchBot, a number of other online services and apps are no longer available. I was remind of how much we depend on cloud services like AWS.

Alexa started responding in the early afternoon, and SwitchBot managed to work properly in the evening. I will have to access the SwitchBot support site to check what is going on, and I would like to reconsider whether it is safe to control IoT devices via such a cloud service.

I think it's very dangerous that the decentralization, which is one of the merits of the Internet, is being centralized by cloud services, and that its significance is being lost.
posted by toons at 23:53 | diary


Today is "The Day of Sound".

Thomas Edison invented the "Phonograph" on December 6, 1877. In other words, it can be said to be the birthday of audio.

When I traveled to Kanazawa city a decade ago, I had a chance to listen to various types of phonographs at the Kanazawa Gramophone Museum.

The one I remember well is the "Victrola Credenza", which was commercialized in 1925 and was called the "King of Gramophones". It was the pinnacle of mechanical phonographs. At that time, the price was enough to buy a whole house.

I had listened to many inexpensive SP gramophones before, but this Victrola Credenza surprised me with its special sound.

Even though it was a 78 rpm SP record played mechanically with no electric amplification and only horn speakers (a compactly folded 180 cm long horn), the sound was so deep and delicate that it was hard to believe it was monaural, and the sense of presence was especially wonderful. Moreover, the playback volume (dynamic range) was sufficient even for a small hall.

It is true that the reproduction frequency range is narrow, but it must have been exquisitely tuned by knowing the sweet spot of human hearing. It might be better to call it an musical instrument.

It was an experience that made me realize once again that 100 years ago, the technology for faithfully recording and reproducing music had reached its peak. Since then, I have come to respect SP record enthusiasts (for their good feeling and good ears).
posted by toons at 22:55 | Audio