Cherry blossoms flowering info in Kyoto Gyoen Park


Yesterday I went to see the cherry blossoms of Kyoto Gyoen park.

"Sidarezakura of Demizu" has have bloomed for 30%. In the park, weeping cherry blossoms and early-flowering cherry blossoms have begun to bloom, but "Somei Yoshino" has not bloomed yet.

It seems that cherry blossoms is a little behind blooming the whole at Konoetei-ato. Water of pond was drained for the repair works.



Such a signboard was standing at Konoetei-ato area.


In the peach forest, white and red peach flowers were blooming. You will enjoy to view both peach blossom and cherry blossom at the same time.


A small flower, Sukiyanagi, was also beginning to bloom.


In addition, Kyoto Imperial Palace is closed from 3/23 to 3/27 due to imperial court event.

posted by toons at 21:14 | diary


New release - "Sound Lissajous Meter" ver 1.0


Sound Lissajous Meter” was newly released today.

"Sound Lissajous Meter" is a new sound analysis app that displays audio signals in Lissajous curves.

Lissajous is a planar figure obtained by combining two single vibrations vibrating in directions perpendicular to each other.

This app can be displayed in a two-dimensional curve by Lissajous in the vertical axis as a microphone input signal and the horizontal axis as a reference sine wave.


For example, when a sine wave with the same frequency as the reference sine wave is reproduced from an audio system, you can observe changes of the frequency or phase in a Lissajous curve pattern.


In the case of an unknown sound source, you can analyze the source using the correlation between amplitude, frequency and phase and the reference sine wave.


In addition, It can display Lissajous demo according to changes in frequency and phase. Please use for Lissajous pattern understanding and learning.


Please to click the following link to see the app information. It will be open the product page on AppStore.

posted by toons at 23:58 | News


Hitigiri - Hinamatsuri's sweets in Kyoto


"Hitigiri", the traditional confectioneries of Hinamatsuri festival in Kyoto.

It is a pastry sweet after sticking out rice cakes roundly and making indentation and placing kinton.

This made by Kyoto confectionery maker, "Sasaya Iori". The shape is quite different depending on the shop, but the part of the rice cake is shaped like a ladle torn off.
posted by toons at 09:46 | diary


Nijo-jo castle - free admission


Yesterday, I went to Nijo-jo castle in Kyoto.

Commemorating the 30th anniversary of the Enthronement of His Majesty the Emperor, it was free admission to Nijo-jo castle on 24 February.

Despite the cold winter season, it was crowded with many tourists and visitors.


Otemon gate and Karamon gate were restored in recent repair projects. But Honmaru-goten palace was under restoration and I could not see at all.


Ninomaru Goten palace was open, so I could enter its inside. It is regrettable that I can not show them because photography is prohibited.


In plum forest, plums began to bloom cleanly. The contrast with the moat was very nice.
posted by toons at 23:56 | diary


FAQ-A013 : What is "Octave Band Noise"?

FAQ-A013 : What is "Octave Band Noise"?

[Answer] "Octave Band Noise" is a noise signal that extracts only energy of a bandwidth of a certain one octave frequency with respect to white noise and pink noise.

The noise signal can be used for various purposes as a reference sound source for environmental sound measurement, sound tuning, auditory effects like tinnitus relief and sound masking.

Our app "Colored Noise Generator" provides an octave band noise can be output programmably.

cng_white_oct_v300.jpg cng_pink_oct_v300.jpg

I will explain "Octave Band Noise" in more detail. An octave is a pitch that doubles the ratio of frequencies to a certain frequency. And the octave band is the bandwidth of the frequency where the ratio of the upper and lower frequencies centered on a certain frequency is exactly one octave. The center frequency of this octave band is called the center frequency, and the frequency band for the center frequency fo ranges from the lower limit frequency fo/√ 2 to the upper limit frequency fo*√2. For example, the center frequency of an octave band is 1 kHz, 2 kHz, 4 kHz ,,,, and one octave is divided into three in the 1/3 octave band.

"Octave Band Noise" is a noise signal that extracts only a specific frequency band with the band-pass filter with the octave band characteristics. Using the noise, it is possible to evaluate only the target frequency band. By measuring the pink noise of a specific frequency band with a real-time analyzer, it is possible to make sound adjustments and measure noise source characteristics that are not affected by other frequency bands.

The figure below shows an example of generating 1/1 octave band noise at the center frequency (1000 Hz and 4000 Hz) with white noise as the source signal. It is FFT analysis result by our audio analyzer app "Audio Frequency Analyzer". Since this measurement result is an instant observation value, it can obtain a flat frequency characteristic within the octave band in time averaging.

posted by toons at 23:57 | FAQ


Plum blossoms blooming ! - Kyoto Gyoen National Garden


At Kyoto Gyoen National Garden, Plum blossoms around "Demizu no Ogawa" are blooming now. It is evidence that the winter's cold peak has passed and it is getting gradually warmer now.


Red plum blossoms are a little blooming ahead.


Wintersweet was also beautifully blooming!
posted by toons at 23:53 | diary


Kyoto marathon


I went to cheer for the Kyoto marathon.


This year 16,000 runners took part. About 5 hours after starting from 9 o'clock in the morning, a lot of people were finished running safely at the goal line in front of Heian Jingu in Okazaki.


The time limit on the race was a rest of 40 minutes, a lot of runners came back to the goal. It was hard work for a long time in the cold!


Since the extraordinary issue of the Kyoto newspaper was dealt, I got it in this memorial.
posted by toons at 23:29 | diary


New updated - "Colored Noise Generator" ver 3.0


"Colored Noise Generator" was updated to Ver 3.0.

”Colored Noise Generator" is a new noise generator that can be used to as the sound source for a variety of acoustic measurement and auditory effects.

In the latest version, newly supported Bluetooth communication and continuous playback.

This app can generate standard noise signals such as white noise, pink noise, brown noise, blue noise, purple noise and gray noise.

cng_white_v300.jpg cng_purple_v300.jpg

In addition, it can generate a specific octave band noise signal by using the band-pass filtering of 1/1 octave band with ideal steep attenuation characteristics.

Octave band noise can be used for various purposes as a reference sound source for environmental sound measurement, sound tuning, tinnitus relief and sound masking.

Octave band noise can be created as a multi-band coupling signal by 1/1 octave band filter with a center frequency from 63Hz to 8kHz.

cng_white_oct_v300.jpg cng_pink_oct_v300.jpg

Octave band noise is also useful to adjust the characteristics of the audibility of earphones or headphones. For example, by selecting the pink noise and playing the 1/1 octave band noise in the order of 125Hz, 1KHz, 8kHz of the center frequency, you can determine the intensity of each frequency band on the audibility. If you know the characteristic of frequency band, you will be able to adjust the earphone in the equalizer to your favorite sound easily.

Please to click the following link to see the app information. It will be open the product page on AppStore.

posted by toons at 18:56 | News


TRIO KA-8100 returns


I have taken out the vintage amp, TRIO "KA-8100" integrated amplifier that had been sleeping for a long time in the storeroom. TRIO "KA-8100" was internationally exported from Japan as the product name of KENWOOD "KA-601".

Last year I restored SANSUI "AU-5500" and I got confidence a little, so I will try it with this amp.

TRIO "KA-8100" is a product released in 1978.
It was called high-speed DC integrated amplifier, it was a product at the time when importance was attached to physical characteristics such as high frequency response, wide band frequency characteristics. There were other KA-9900, KA-8700, KA-8300 in the product series, and this amp was a low end model.


It is undamaged and beautiful on the front panel. In addition, the rear panel is clean and rust is not floating. However, one speaker terminal of SP-A channel had been damaged. The power supply cable was also replaced, it was shortened to about 50 cm.

For the time being, when I tried to energize this amp there was no smoke, and the protection circuit was canceled, and the amplifired sound was safely.
However, since the operation is unstable, the sound of one channel is distorted. If I was electrified for a while, I got stereo sound normaly. Although it seems not to be fatal, there seems to be contact failure somewhere.

As a tendency of sound, it is quite different from the thick sound of Sansui "AU-5500", it is a refreshing sound with high frequency extended.


I removed the top cover and checked the interior top surface, but it is hardly dusty or dirty as it was contained in the original box.


It seems that "KA-8100" was used for about 3 years, but it was stored for the following 38 years.

Furthermore, I removed the bottom cover, I was surprised that there was some electrical remodeling. Film capacitors had paralleled to the block capacitor of the main power supply, and the output signal wiring had shortened out minimum.

Not remembered why I did this, but probably I could not be satisfied with the original sound.

Once restored to its original state, I would try to repair.

Also, I checked DC leakage of output signal, but both channels were excellent, less than 0.1 mV. "KA-8100" is certainly a DC amplifier.

Anyway, I think that it will take quite a while to repair "KA-8100" amp.
posted by toons at 03:24 | Sound


Setsubun Festival of Kyoto - Yoshida shrine


I went to Setsubun Festival of Yoshida Shrine last weekend. Setsubun is the New Year of the lunar calendar.

In Kyoto, Setsubun Festival is held at various shrines and temples, but it is particularly famous at Yoshida Shrine which has been honored as a guardian gate of Kyoto city.


The admission was restricted on the approach stairs for the large number of people.


I got happy beans with a lottery ticket.


"Daigengu" in the back place of Yoshida shrine is the birthplace of Setsubun Worship, and we can visit at night only during Setsubun Festival.


posted by toons at 23:57 | diary