塩谷 宏の仕事

The Beginnings of
Japanese Electroacoustic




1.「素数の比系列による正弦波の音」黛 敏郎
音程、強さ、持続時間を素数比から算出、 正弦波、鋸歯状波、方形波(短形波)、ホワイトノイズ発信器を使って制作された。着想にあたってはシュトックハウゼン「習作1」を参考とした部分音構成を基準に素数の比を選んだ。
2.「7のヴァリエーション」黛 敏郎 & 諸井 誠
12音技法の音列作法から発想した音列で倍音のでてこない音列 (49√7n×70として、70Hz-10015Hz)の音階が使用された。この音列は主として純音、短形波、鋸歯状波に当てはめられ、ホワイトノイズはオクターブ・ フィルターによってバンドカットが行われており、この組み合わせによって一種の音階が形成されている。 数列は周波数選択の構成、対位法、強弱、エンベロープ、時間要素にも適用された。
3.「ピタゴラスの星」第1部「沈黙の環」諸井 誠
電子音だけではなく、モノローグや合唱、様々な楽器音、 電子楽器オンド・マルトゥノ等、あらゆる発音体を音源とした。この曲ではピタゴラス的発想からの数列一音列作法が用いられているにも関わらず、音の時間的変化に対する音色の変化により叙情的な劇作品となった。
4.「ヴァリエテ」諸井 誠
5.「オリンピック・カンパノロジー」黛 敏郎


1-1. “Music for Sine Wave by Proportion of Prime Number” Toshiro Mayuzumi
1-2. “Music for Modulated Wave by Propotion of Prime Number” Toshiro Mayuzumi
1-3. “Invetion for Square Wave and Saw-tooth Wave” Toshiro Mayuzumi
The pitch, intensity, and duration were calculated from the prime ratio, and were produced using sine wave, saw tooth wave, square wave (short wave), and white noise generator. For the idea, the ratio of prime numbers was selected which is based on the partial sound composition with reference to “Study 1” by Stockhausen.
2. “7 Variations” Toshiro Mayuzumi & Makoto Moroi
The tone rows that was gotten the idea from the tone rows method of the twelve- tone technic and that did not include harmonic overtones (49√7n × 70, 70Hz-10015Hz) was used. This tone rows are mainly applied to pure tone, short wave, and saw tooth wave, and white noise is band-cut by the octave filter, and this combination forms a kind of scale. The sequence was also applied to frequency selection configurations, counterpoints, strengths, envelopes, and time elements.
3. “Pythagoras Star” Part 1 Mamoru Moroi
Not only electronic sounds, but many other sounds were used: monophonic and choral, various musical instrument sounds, electronic musical instruments such as Ondes Martenot, and so on. This work was a lyrical dramatic work due to the change of the timbre with respect to the temporal change of sound, despite the use of a number sequence (tone sequence method) from the Pythagorean idea.
4. “Variete” Makoto Moroi
Denying mathematical sound sequence, the Chance Operation method was used, with the appearance rate of pitch, strength, rhythm, and duration being uncertain and randomly distributed using cards, random numbers, etc. It is said that there are limitations to this method’s technique because tapes are edited by hand, with respect to the rhythm, the duration and the level distribution.
5. “Olympics Campanology” Toshiro Mayuzumi
This work, which was composed based on the sound of the temple bell, was created for the opening ceremony of the 1964 Tokyo Olympics and for the admission of the Emperor. The basic theory is that the element that determines the tone of the temple bell is determined during the transit period of the moment the temple bell is struck.
6. “Telemuzik” Karl Heinz Stockhausen
This is a five-channel work that uses collage of materials from Amazon, South Sahara, Spanish countryside or China, and Nara Omizutori and Gagaku music. In this work, he states, "In the process of imagination with electronic sound, three different elements = time and history (traditional) space can be brought together."



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