In the Hifi sector, various ideas circulate about what the ideal DA converter should look like: NOS, R2R, Ladder, and DSD of different clock rates. However, the delta-sigma principle has been widely accepted in the audio industry for decades, and experts have not questioned it for a long time. Nevertheless, it has also been state of the art for about twenty years to use a higher word width than 1-bit, in contrast to DSD, which uses only 1-bit word width, regardless of whether 64fs or 512fs. Modern delta-sigma converters typically operate at clock rates of 256fs and at 5 or 6 bits. The accuracy with which the original analog signal can be reconstructed in this way is definitely not be unachievable by any other method.
In an ideal setting, a NOS converter may possibly create euphony. But along this route the original essence of the music with all its subtleties will be affected and details will get lost. Admittedly, the delta-sigma principle has its weaknesses as well. This is why the “arfi-DAC-Topology” uses the interaction of a larger number of converter chips – four or eight – with current output, which generate the balanced output signal by means of a sophisticated circuit, with a transformer in the centre of the current-voltage conversion (I/V). Thus artefacts created during the conversion process that actually have nothing to do with the original music signal are largely neutralized. The result is the precision of the Delta Sigma process coupled with very natural and coherent sound. Music shines with its original fascination and intention.