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IIJ, KORG, Saidera Paradiso, Sony to present the live streaming events featuring DSD™ 5.6MHz high-resolution audio

dl button PDF [152 KB] 22 January 2015

TOKYO-January 22, 2015-Internet Initiative Japan Inc. (IIJ), KORG Inc. (KORG), Saidera Paradiso Ltd. (Saidera Paradiso) and Sony Corporation (Sony) today announced that they will conduct open technological experiment of live-streaming using the high-resolution digital audio format "Direct Streaming Digital (DSD™) 5.6MHz". The four companies have partnered with the "Spring Festival in Tokyo"-one of Japan's premier music festivals-and the Berliner Philharmoniker-one of the most preeminent orchestras in the world-to live-stream two concerts, listed below, in April. Audiophiles around the world will be able to enjoy these demonstrations.

"Tokyo-HARUSAI Marathon Concert vol. 5: Music from the Classical Period-Musicians in Vienna, a Music Capital," to be held from 11:00 am to 8:00 pm (JST) on April 5, 2015 at the IIJ-sponsored Spring Festival in Tokyo

Concert by the Berliner Philharmoniker at the Philharmonie Berlin, with Sir Simon Rattle conducting, to commence at 7:00 pm (CET) on April 11, 2015

DSD 5.6MHz is a method for converting analog audio sources to digital audio. Recently, it has been gaining currency and popularity as a format for distributing high-resolution audio. DSD 5.6MHz allows the distribution of high-quality audio that faithfully reproduces the original analog sound. Recordings that use the format digitize audio waveforms at a sampling frequency(*1) that is 128 times that of an audio CD, thus capturing a vast amount of information. Due to the large volumes of data involved, the broadcast of live streaming events in DSD 5.6MHz format will be a potentially groundbreaking technical endeavor-something yet to be attempted anywhere in the world.

Within their own homes, interested members of the public will be able to enjoy immersive, high-quality audio that will sound as though they are right there inside the concert hall. They will need to do is to install dedicated software on their PCs and to ensure that they have a compatible DAC(*2).

During these experimental tests, KORG will encode the live audio at the source, KORG and Sony will perform DSD signal processing, and IIJ will provide the platform and network for streaming it. Seigen Ono-a leading light of the audio world and the audio recording and mastering engineer of Saidera Paradiso-will oversee the project as a whole. 

The Spring Festival in Tokyo, which is one of the events participating in the upcoming tests, has already been distributing concerts over the Internet for several years so that the festival's music can be enjoyed by a wider audience. Similarly, through its Digital Concert Hall concert video streaming service, the Berliner Philharmoniker has always striven to use new technologies popularize high-quality music among listeners worldwide. The upcoming live tests of DSD 5.6MHz streaming audio distribution will allow people around the world to listen to the exquisite musical content produced at the Spring Festival in Tokyo and the Berliner Philharmoniker in high-quality tones that are virtually unchanged from the source. Through similar undertakings in the future, each company, IIJ, KORG, Saidera Paradiso and Sony will continue to build upon their experience with the latest technologies and to contribute to the development of techniques for digital distribution.

(*1) Sampling frequency: the number of times per second at which analog audio is sampled to digitize its waveform. Higher frequencies allow the recording of higher ranges of sound.

(*2) DAC: a digital-to-analog converter

(*) DSD is a trademark of Sony Corporation.

Overview of the Streaming Events

Spring Festival in Tokyo

Content Live streaming of a Tokyo-HARUSAI Marathon Concert (held in the Recital Hall of the Tokyo Bunka Kaikan)
Tokyo-HARUSAI Marathon Concert vol. 5: Music from the Classical Period-Musicians in Vienna, a Music Capital
Johann Peter Salomon (1745-1815)-A Musical Impresario-and the Composers Haydn, Mozart, and Beethoven
Streaming date and time 11:00 am on Sunday, April 5, 2015 (scheduled to finish at 8:00 pm)

(*) Tokyo-HARUSAI Marathon Concerts use "IIJ Contents Delivery Service" and are distributed using multistreaming methods so that they are viewable on a variety of devices. However, DSD 5.6MHz distribution will be audio only.

Concert by the Berliner Philharmoniker conducted by Sir Simon Rattle

Content Live streaming from the Philharmonie Berlin (located in Berlin, Germany)
  • [Program]La damnation de Faust by Hector Berlioz
  • [Orchestra]Berliner Philharmoniker
  • [Conductor]Sir Simon Rattle
  • [Soloists]
    Charles Castronovo (Faust), Joyce DiDonato (Marguerite),Ludovic Tézier (Méphistophélès), Florian Boesch (Brander)
  • [Chorus]Rundfunkchor Berlin (Chorus Master: Simon Halsey)
Streaming date and time 7:00 pm (CET) on Saturday, April 11, 2015 (scheduled to finish at 9:40 pm); 2:00 am (JST) on Sunday, April 12, 2015 (scheduled to finish at 4:40 am)

(*) The Berliner Philharmoniker will have a paid live stream of the performance in high-definition video via its Digital Concert Hall video streaming service. The DSD 5.6MHz stream will be provided at no charge for audio only. Following the live transmission, the performance of the DSD 5.6MHz stream will be distributed on-demand for a limited periodFor more details, please see the DSD Live Streaming site ( that has been specially set up for this event.

Viewing environment

Viewing of the transmissions with DSD 5.6MHz format audio requires a PC, dedicated software for the demonstrations, and a compatible DAC.

  • The software can be downloaded from the site that has been specially set up for the events.
  • Please be sure to have a DSD 5.6MHz-compatible DAC (D/A converter).
    Compatible DACs:
    • KORG DS-DAC-10
    • KORG DS-DAC-10-SV
    • KORG DS-DAC-100
    • KORG DS-DAC-100m
    • Sony USB DAC System for PC Audio UDA-1 (Windows only)
    • Sony Portable Hi-Res DAC/Headphone Amplifier PHA-2 (Windows only)
    • Sony Portable Hi-Res DAC/Headphone Amplifier PHA-3 (Windows only)

Graphical Overview of Streaming Distribution

Streaming DistributionStatement from the Spring Festival in Tokyo

Since 2010, this music festival has received technical assistance with distribution from our crucial sponsor IIJ. Together, each year, we have braved various challenges using the latest technologies. We first started with on-demand distribution of the music festival's proceedings, but, when the 2011 Great East Japan Earthquake struck the following year, IIJ helped us collect donations from around the world via a paid live stream of our charity concert (Beethoven's 9th Symphony with the NHK Symphony Orchestra, conducted by Zubin Mehta and held on April 12, 2011). Since 2012, we have live-streamed the Tokyo-HARUSAI Marathon Concert each year by using the latest distribution technologies to their fullest extent. This year, we are able to challenge ourselves in the pursuit of audio quality-one of the most important factors when it comes to the act of listening to music-for our live-stream. Those of us who are engaged in the art of music see this as the opening up of many new possibilities for the delivery of music and believe it to be a profoundly meaningful endeavor. We feel honored to undertake the challenge of DSD audio streaming, which will make it possible to transmit audio at a level of quality virtually indistinguishable from that of the raw sound at the performance hall.

Naoko Ashida,
Managing Director, Executive Committee Office, Spring Festival in Tokyo

Statement from the Berliner Philharmoniker

The Berliner Philharmoniker has been intensely interested in technological innovations in music media since the days of Herbert von Karajan, and so we aspire to present our performances to people using the most advanced technology. One result of this aspiration was the Digital Concert Hall which we launched in 2009, the first performance video streaming service with high-definition video and high-quality audio in the classical musical world. We are also actively pursuing high-resolution audio recording, and DSD live streaming is currently one of the areas which we are most keenly interested in. We have high hopes that this upcoming trial will bring a new vision to the world of audio distribution.

Olaf Maninger,
Principal Cellist and Media Chairman, Berliner Philharmoniker

Spring Festival in Tokyo

Celebrating the coming of spring to Tokyo with a festival and via the medium of music-The Spring Festival in Tokyo is a music festival that is held on the stage that is Ueno Park-a place that, starting in the Meiji Era, has developed into a mecca for culture and the arts in Japan-and that lasts for a month during the beautiful time of the cherry blossoms. The 11th annual music festival will happen this year, the event having first been held in 2005. During this year's festival, around 130 performances will occur, including the Tokyo-HARUSAI Wagner Series at the Tokyo Bunka Kaikan; shows by first-class artists from Japan and overseas; Museum Concerts whose venues are institutions for the fine arts and the sciences; and small, free "Recitals in the City of Cherry Blossoms" concerts.

Event period: March 13, 2015 (Friday) to April 12 (Sunday)

More information:

Berliner Philharmoniker

The Berliner Philharmoniker is the world's premier orchestra, based in Berlin, Germany, and built its reputation under such legendary conductors as Herbert von Karajan and Claudio Abbado. Sir Simon Rattle has served as the institution's chief conductor since 2002. The Berliner Philharmoniker has demonstrated a keen interest in recording media since the times of Karajan, and it was together with him that the orchestra ushered in the CD era. Since then, the Berliner Philharmoniker has continued to advance the frontiers of the classical music world with new technologies: In 2009, the orchestra launched the Digital Concert Hall, a video streaming service with high-definition video and high-quality audio.

More information: