Our MU1 Music Player is receiving critical acclaim for its sound quality. Many people ask us how a unit with just digital inputs and outputs can improve the sound quality so much, so we decided to write this explainer text. At the core of the MU1 a so called ‘FPGA’ processor is found. This isread more >
Thursday October 17th 2019, at the 147th AES Convention in New York, Eelco Grimm will present his AES paper 10268 “Analyzing Loudness Aspects of 4.2 million Music Albums in Search of an Optimal Loudness Target for Music Streaming”. The research for this paper was performed in 2017 for HKU University of the Arts Utrecht (whereread more >
Cable assemblies are available in many different types. One can easily get lost in the woods, especially when interfacing unbalanced and balanced equipment, or using sub-D connectors for analog or digital audio. As a service to our cable assembly customers, we wrote an extensive document that shows the standard pinouts and wirings of the variousread more >
On the initiative of Eelco Grimm, five professionals from the audio field joined forces to write an ‘e-Brief’ for AES that proposes the introduction of a new loudness measurement called “PSR”, the Peak to Short-Term loudness ratio. Companies from the authors (RTW, Nugen Audio, MeterPlugs) had implemented such meters and Eelco saw the need forread more >
For those who love to have deep understanding of our unique DMF digital motional feedback subwoofer, we offer no less than six white papers by its designer Rob Munnig Schmidt: about how loudspeakers work; about sources of distortion in loudspeaker driver design; about why to avoid bassreflex designs; about acceleration based motional feedback subwoofers; aboutread more >
Eelco Grimm is researcher at HKU University of the Arts Utrecht and works on loudness normalization topics. He wrote a “Recommendation for loudness normalization by Music Streaming Services”. This document is the summary of a large survey that Eelco conducted on 4.2 million albums of the database of music streaming service Tidal. A protocol wasread more >
We made a beautifully detailed 3D model of the white LS1 for you. You can use it in the popular 3D design environment Sketchup (formerly of Google, now Trimble). It is available via Sketchups 3D Warehouse or via the direct download link below. And for the real fans, you can download a 3D printer fileread more >
Grimm Audio’s LS1 is an unusual loudspeaker. Its wide but shallow cabinet is the direct opposite of nearly all contemporary loudspeakers and the DSP filter is mainly IIR based in spite of the availability of cheap DSP. Why? This white paper argues that all choices derive from basic acoustics, signal theory and psychoacoustics.read more >
Eelco Grimm chaired a ‘gating’ subgroup of the EBU PLOUD working group that wrote the R128 recommendation for broadcast loudness. The task of the subgroup was to address the problem that movies with large parts of near silence, such as ‘No Country for Old Men’ of the Coen Brothers would receive a too low overallread more >
On May 19th 2005, when the ITU BS-1770 loudness measurement standard was still under development, Eelco Grimm organized the ‘Loudness Symposium” in The Netherlands. A few hundred people from all corners of the broadcast world, including sound engineers, equipment manufacturers, movie directors, station managers and advertisers enjoyed a full day of presentations, demonstrations and panelread more >
