Bert van der Wolf on Music and Recording






In this section we bring you:
  • EVENTS in which we describe and discuss happenings of significance to audio technology
  • A selection of technical PAPERS. Some of these are very technical and so each one has a brief summary. The full paper is available as a PDF Download
  • VIDEOS of interest to audio- and musicophiles. We start with a short film showing the machining process for the manufacture of a dCS Puccini Transport fascia
  • ARCHIVE where we will store old papers as we publish more and more new ones


 Sunday 13 April
To celebrate their 25th Anniversary Managing Director David Steven and his team will be hosting an evening of great music and audiophile conversation in The David Josefowitz Room at London's Royal Academy of Music.
Live music from superb Dutch jazz combo Jungle Boldie will be followed by a musical extravaganza in which Northstar Recording's Bert van der Wolf  will tell the story of 'The Spirit of Turtle' illustrated by some of the favourite tracks that he has recorded during his long career...
...and don't forget that all this will be played on one of the world's finest audio systems featuring dCS' legendary flagship Vivaldi system... plenty of opportunity to chat with the dCS team and fellow audiophiles.
The fun begins at 5 pm and finishes at 8pm. Admission is strictly by ticket only.

Papers, How-To & Insight


'Filtering' poses and answers three critical questions that audio engineers and designers have to address:

    1. why are filters needed?
   2. why aren't all filters born equal?
   3. what choices does an audio engineer have to make when designing filters?
..and, if you have even wondered what Aliasing is or why Nyquist Frequencies matter, look no further...!  

View PDF


Spirit of Turtle

North Star Recording founder - and recording engineer extraordinaire - Bert van der Wolf explains the history of ‘Spirit of Turtle’ and why he chose the tracks appearing on our current Album of the Month




A collection of the most innovative high-end recordings by NorthStar Recording


 Every now and then something really special happens to delight us music loving audiophiles and this 2 disc collection is most certainly one of those events...and a very major one. We have long been fans of Netherlands-based recording engineer (genius?) Bert van der Wolf (as witnessed by our interview with him in the early life of ONLY THE MUSIC) and this album features some of the very best of his recordings for his Turtle label over its 15 year life.

For your money you get two discs, one a HYBRID SACD and the other in Pure Audio BLURAY format, together with a delightful booklet telling you something of the history of Turtle Records and, penned by Bert himself, a brief but informative description of each of the tracks on the disc.
The 14 tracks on each disc are all excerpts chosen by Bert from his favourite recordings over the 15 years that he has been recording music for Turtle Records. They include his earliest recording for Turtle and one of his very latest. The genres range from superb classical recordings (Beethoven, Mendelssohn, Bruckner, etc) to wonderfully inventive jazz pieces. All are musically a total delight and represent 77 minutes of the most enjoyable music I have heard for many moons.
But the good news does not stop there for every one of these tracks is also a sonic miracle showcasing Bert's world class engineering expertise. These recordings define the oft-used expression 'demonstration quality' and, as a result, this set has instantly become my number one test album...and my top album for musical enjoyment as well. 
No wonder we accepted - without hesitation - the invitation to sponsor this set celebrating Turtle's 15th Anniversary (and Bert's 25th year in the recording industry!).
Absolutely gorgeous!! 
THE SPIRIT OF TURTLE set is available for €49.95 (Incl. VAT). Click here to purchase.