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AK300 is capable of bit-to-bit playback up to 24 bit, 192kHz.32 bit audio is downsampled using a sample-rate converter (SRC). In addition, DSD 64/128 can be played back via conversion to PCM.32 bit, 384kHz is downsampled to 24 bit, 192kHz, and 32 bit, 352kHz is downsampled to 24 bit, 176kHz for playback.DSD 64/128 is converted via DSD-to-PCM to PCM 24 bit, 176kHz for playback.32 bit SRC by the AK300Astell & Kern PlaybackDSD-to-PCM Conversion by the AK300Astell & Kern Playback
A parametric equaliser (PEQ*1) was implemented in the AK380 to deliver detailed adjustment of the original sound, and an audio digital signal processor (DSP) was added to aid in this process.This frees up CPU cycles previously needed for calculating graphic equalisers (GEQ), allowing more detailed and accurate calculations via the dedicated DSP.The audio DSP expands the existing 10-band, ±0.5 dB graphic equaliser (GEQ*2) to 20-band, ±0.01 dB to more precisely adjust the frequency and gain (dB) as well as more accurately specifying the frequency range via Q value adjustments.The AK300's PEQ Playback Using Audio DSPAstell & Kern PEQThe other Products GEQ Playback Using Audio DSPAstell & Kern PEQAK300 20-band PEQ and AK100 Ⅱ 10-band GEQ Frequency ValuesAstell & Kern PEQWhat is Parametric Equalization (PEQ*1)?Parametric equalization refers to the ability to increase or decrease the volume within the Q value range. A Q value is a frequency range relative to a selected frequency. The frequency range decreases when the Q value increases and vice versa.AK300 PEQ
Graphic equalization divides the audible frequency register into several registers and increases or decreases the level of each register with a volume slider to adjust the respective frequency's characteristics. The switches of the volume slider are connected like a graph to visually determine the frequency characteristics, hence the name "graphic equaliser."Astell & Kern GEQFemto Clock Delivers True Original SoundAstell&Kern implemented a voltage-controlled crystal oscillator (VCXO) high-precision clock with a reference jitter value of 200 femto seconds*3.Femto clocks are commonly used in high-end audio systems, and the clock is measured in high-precision femtosecond units (one quadrillionth of a second).
A VCXO, or a voltage-controlled crystal oscillator, is a type of crystal oscillation device that creates oscillation frequencies. External environmental stimuli, which in this case mean voltage inputs, influence the frequency value. Adjustments to the voltage input tunes a precise frequency value.
Jitter refers to the undesired deviation in time that occurs in a periodic signal. In this case, jitter is the error that occurs in the reference clock required to perform the sampling in digital audio equipment.By utilizing a femto clock, the AK300 is able to create a more accurate frequency value and make fine jitter corrections.As a result, the AK300 faithfully reproduces analog sound closer than ever to the original source when transmitting a digital signal as an analog signal.Astell & Kern Femto Clock
The AK300 supports USB DAC functionality.The AK300 can be connected to a PC or Mac via USB for use as a USB DAC that supports PCM/DSD.When playing back music stored on a PC or Mac, the Dual-DAC is able to deliver richer audio of outstanding soundstage and resolution well beyond the limits of a built-in sound card.When using the AK300 as a USB DAC, its PEQ settings are not applied, and output up to 24 bit, 96kHz is supported.DSD 64/128 is converted via DSD-to-PCM for playback.Astell & Kern USB Dac
Astell&Kern has further enhanced DLNA functionality via the AK Connect app.Wireless networking DLNA (version 1.0) connects to a NAS or PC, and is easily controlled with a smartphone or tablet through AK Connect.Source files on a PC or NAS can be freely transferred and streamed without the hassle of turning on the computer and physically connecting with a cable.If on the same access point (AP) network, music files on a PC or NAS can be played back via DLNA.AK300 Connect
DMP (Digital Media Player)Finds a list of content on a media server for selection and playback.
DMC (Digital Media Controller)Finds a list of content on a media server and establishes a connection to a playback-capable device (renderer). By default, a DMC establishes a connection between a media server and media renderer and controls content playback-related operations.
DMS (Digital Media Server = Network Server)Actually stores the media content to be shared. When connected to a network, the DMS transmits/distributes the media content for other devices to stream or download
DMR (Digital Media Renderer = Network Player)Connects to a media server via media controller for content playback.