64 bit programs are better for Broadcasted Music PC Receiver

The software is very important for optimally configured PC to play music from streams and with good Hi-FI equipment

Therefore, listening tests of the software are needed and for 64 bit they started with the free AIMP music player. The relevant beta was released on April 12, 2022, and its author wrote on the blog:

Today we have started public beta-testing of AIMP for Windows v5.03. As we have announced, this release brought native Windows 64-bit support. Since now, player will releases in two editions: 32-bit and 64-bit.

Currently, we have been testing stable 64-bit versions with Reference BienSoundPC for a long time and the music is played even more faithfully

Obrazek

We tested with the Realtek Semiconductor Corp driver. 9205.1 released on 7/13/2021. In it, we manually configured the distance between the speakers used in the tests, and the DAC work at 16bit / 192kHz. AIMP worked with WASAPI and 32/192 oversampling



Tests with the motherboard, which has a separate audio section, and the CPU runs at 48 GHz, and RAM half as good, turned out to be particularly favorable.



The FFmpeg libraries has been updated in AIMP to 64 bit version 4.3.3 

FFmpeg is a free and open-source software project consisting of a suite of libraries and programs for handling video, audio, and other multimedia files and streams.

FFmpeg supports decoding of aac and mp3 which are used for streaming, and with 64 bit technology it can be done more efficiently

Advanced Audio Coding (AAC) is an audio coding standard for lossy digital audio compression. Designed to be the successor of the MP3 format, AAC generally achieves higher sound quality than MP3 encoders at the same bit rate.

In mp3, it is only a little easier to decode 576 separate signals into which the 20 Hz - 20 kHz audio band is divided. The codec analyzes them on the basis of a psychoacoustic model and determines the accuracy with which each of them should be encoded.

 

The format of the mp3 stream depends on the sender Constant Bit Rate or Variable Bit Rate



and there are also CVBR and AVBR

 

We are currently testing the free foobar2000 that came in the 64 bit beta and FFFmeg is in version 5.1


 WSAPI support is still missing, which is for the 32-bit version. 

 

A 64 bit ASIO plug-in appeared, but the author of the program clearly points out:
Please note that this component is meant for systems where ASIO is the only available output method. It is highly recommended to use the default output modes instead of ASIO. Contrary to popular "audiophile" claims, there are NO benefits from using ASIO as far as music playback quality is concerned, while bugs in ASIO drivers may severely degrade the performance.

 

 

Windows Audio Session API – Very low-level API for rendering audio, render/capture audio streams, adjust volume etc

David Aleksandersen on December 11, 2017, wrote a broader explanation, where he provides, among others:
is Microsoft’s multi-channel audio interface for communication with audio devices. WASAPI was introduced with Windows Vista™ and is supported by Windows 7 and later versions. WASAPI delivers an unmodified audio-stream to a sound device, and provides similar benefits as ASIO.
 
Applications communicate with the audio driver through Sessions, and these Sessions are programmed through the Windows Audio Session API (WASAPI). In general, WASAPI operates in two modes. In exclusive mode (also called DMA mode), unmixed audio streams are rendered directly to the audio adapter and no other application's audio will play and signal processing has no effect. Exclusive mode is useful for applications that demand the least amount of intermediate processing of the audio data or those that want to output compressed audio data such as Dolby Digital, DTS or WMA Pro over S/PDIF. WASAPI exclusive mode is similar to kernel streaming in function, but no kernel mode programming is required. In shared mode, audio streams are rendered by the application and optionally applied per-stream audio effects known as Local Effects (LFX) (such as per-session volume control). Then the streams are mixed by the global audio engine, where a set of global audio effects (GFX) may be applied. Finally, they're rendered on the audio device.  
 
 
Obrazek
Forums Audio, Audio, Audio!Audio DACs, Streamers, Servers, Players, ADCs
Jun 15, 2019 by daftcombo, Major Contributor

WASAPI (event) 16 bit
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ASIO Focusrite driver
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The 64 bit LAV Filter in the latest version is recommended to be installed as the default in Windows
LAV Filters is a multi-format media splitter/decoder that uses libavformat to play all sorts of media files. MKV/WebM, AVI, MP4/MOV, MPEG-TS, FLV, OGG are tested and will be registered for. Other formats can be tested using GraphStudio. H264/AVC, H265/HEVC, VC-1, MPEG4-ASP (Divx/Xvid), VP8, VP9 have been tested and are working well. DTS, AC3, TrueHD, MP3, Vorbis have been tested. Subtitle Support. Stream Switching. https://www.videohelp.com/software/LAV-Filters

This software is the reference for Audiophile PC

 


 https://www.facebook.com/AudiophilePC

 
 
Brodcasted Music PC Reciver has the optimal configuration for listening music on-line
 
Audiophile Music Server PC is for playing music from hard drive

It was created with the intention of connecting to a traditional hi-fi set, in which the loudspeakers can also be adapted to the furniture. Good loudspeakers and an amplifier are enough for it. The computer replaces the additional audio equipment to handle the recorded music, which has been stored on different media or is from broadcast. Unique vinyl records can be ripped with studio quality to a hard drive. Even 1970s quadraphonic records can be copied and played back.
  
Windows has a handy function so that the music playback is optimally calibrated to the arrangement of the any loudspeakers in the room

Music can be played traditional with 2 loudspeakers or 4 with the new surround configuration
 

The combination with active coaxial speakers is even more practical for home and music listening

Many of the problems that these different speaker types attempt to solve arise from the fact that the drivers are some distance apart. But what if they weren’t? That’s a question that speaker designers have been asking themselves since the 1940s, since which time a number of companies have attempted the seemingly impossible task of putting two drivers — a tweeter and a midrange driver or woofer — in more or less the same place, so that they fire along the same axis, or coaxially.

The exact details of coaxial drivers vary slightly between manufacturer (Tannoy and KEF, the most famous proponents of coaxial speakers, both hold patents that protect their exact methods), but they fundamentally require that the tweeter is either built into, or placed in the centre of, the woofer. By doing so, all the complications of driver coupling and time‑of‑arrival differences are eliminated, resulting in a wider monitoring ‘sweet spot’, with no ugly cancellations around the crossover frequency as you move around in front of the speakers.
 
With coaxial drivers behaving much more like the theoretically perfect ‘point source’ speaker, there’s no disadvantage to using them up close.
 
The BienSoundPC listening tests performed particularly well with the APS Coax produced in Poland with an electrodynamic speaker driver from  the Norwegian SEAS - (THE ART OF SOUND PERFECTIO)

The APS COAX is an active two-way near-field monitor designed using the Coaxial approach where the precoated fabric dome of the tweeter intergrates with the cone of woofer to a point source - the acoustic position of the source remains the same regardless of change in distance. 
  • SPL in Free Field @ 1m:
    • RMS: 101 dB (single)
    • Peak: 109 dB (pair)
  • Power Amplifiers: 70 W RMS
  • THD: 
    • 0.005 % – PO = 5 W, f = 1 kHz
    • 0.1 % max – PO = 0.1 up to 50 W, f = 20 Hz up to 20 kHz
  • S/N Ratio:
    • 103.5 dB – weighted by A curve 
    • 101 dB – in band of 20 Hz up to 20 kHz
  • Input Voltage Level for 100 dB SPL in Free Field @ 1m: 0 dBu (i.e. 0.775 V) – calibrated regulators in 0 dBu, 0 dB positions

The much cheaper Tannoy Gold is also a very good deal and extremely attractive for 4-channel music playback with the new Microsoft configuration

more information @ blog

 

New KEF wireless loudspeakers support already streaming services, but Broadcasted Music Receiver and Audiophile Music Server on PC give them even more options

more information @ blog

 

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