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  1. Am tot citit in ultimul timp cum ca sunetul ar fi influentat de componentele interne din calculatoare in afara placilor de sunet,unii avansand termenul de calculatoare audiofile.Ce anume din componenta interna a calculatoarelor in afara placilor de sunet pot influenta sunetul ?
  2. ghidul începătorului - pick-up http://www.theaudiobeat.com/vpi_ms/
  3. Salut, Nu stiu daca am postat unde trebuie. Vreau sa achizitionez SH un subwoofer pt sistemul meu stereo compus din boxe Monitor Audio Bronze 2, AMP NAD 326BEE si un dac Bluesound Node 2. La unele melodii parca simt nevoia de un subwoofer. Nu vreau ceva puternic. Bass ul nu vreau sa fie sunetul predominant. Ma gandeam la ceva de genu Monitor audio VW8. Multumesc
  4. Propunerea de subiect este al lui Tudor, eu doar il ajut sa treaca pragul analogic catre cel digital. Am sa incep cu un mic dictionar de termeni specifici domeniului. Asa ne va fi mai usor sa evitam viitoarele neintelegeri. ADC: Analogue-to-Digital Converter. This device converts analogue input signals (from, e.g., a microphone) to a digital signal that can be used in computations (for example in a PC program) (Anti-) aliasing filter: Filter designed to remove any signal larger than the Nyquist frequency. Authoring: Process in which the final disc image is created. This includes lossless compression, creation of the table of contents etc.. Clipping: The phenomenon that when a format is designed to handle signal levels no larger than a level C, every level larger than C is coded as C. For example, the digital format on a CD cannot handle more than 65536 sub-levels; any signal corresponding to a level larger than +32767 is represented as +32767 (and likewise for negative signals less than -32768). Clock jitter: Technically the unwanted phase shift of digital pulses over a transmission medium. A discrepancy between when a digital edge transition is supposed to occur and when it actually does occur. DAC: Digital-to-Analogue Converter: the reverse of a ADC. Distortion: Any deviation from a linear input/output relationship, where a linear relationship is defined such that the output equals (apart from a constant gain factor) the input. Dithering: The addition of a (quasi-)random number to the signal which is subsequently quantised. Due to the dither, the quantization appears as an (almost) linear process. DSD: The digital format stored in Super Audio CD. DSD is a format in which 2822400 times per second a 1-bit signal is stored. Lowpass-filtering this signal will restore the original waveform. DST encoding: Direct Stream Digital, a lossless compression algorithm specifically tailored to the lossless compression of DSD signals. Filter ringing: The effect that a filter with a steep transition band in the frequency domain produces artefacts in the time domain that extent over a significant period of time. Idle tone: Tone appearing at the output of a noise shaper that bears a simple relation to the input of the Sigma Delta Modulator. Limit cycle: Signal at the output of a Sigma Delta Modulator that requires a precisely defined input in order to occur, and disappears if the input deviates slightly from the mentioned precise value. Linearity: See distortion. Noise shaping: The shift of spectral content of the (quantization) noise. For example, in a Sigma Delta Modulator the energy of the quantization noise is shifted to high frequencies, leaving no or little noise at low frequency. Nyquist Frequency: The largest frequency that can be represented by a digital format; the Nyquist frequency is half the sample frequency. PCM: Pulse Code Modulation. A digital format, used for example in CD, whereby a digital signal is represented by an accurate representation (e.g., 16 bits, meaning that the range -1,+1 is subdivided in 65536 sub-intervals) of the wave form at equidistant points in time (for example, in CD 44100 times per second a 16-bit approximation of the wave form is stored). Pulse Density Modulation: A form of pulse modulation where a large positive signal is represented by a long series of positive pulses; a zero signal is represented by alernating positive and negative pulses. (Re-)Quantization: The mapping of a signal of infinite precision to a signal with limited precision. On a CD, e.g., a signal is quantized to 16 bits. Sigma Delta Modulator: Device which transforms an analogue or PCM signal in a DSD signal. Often abbreviated to SDM, and also often referred to as Delta Sigma Modulator. Super Audio CD: Super Audio Compact Disc. Format for music distribution proposed by Philips and Sony. Super Audio CD is based on a new digital format called DSD. Topology: Particular way of connecting building blocks to create a circuit. Up/Down sampling: A signal processing technique whereby the sample rate of a digital signal is enlarged or reduced. In the latter case, this also corresponds to a loss of information.
  5. Salutare, Apelez la sfaturile voastre pentru urmatoarea problema: sunt un pasionat de muzica si mi-am achitionat recent un amplificator pe lampi Ayon Scorpio si o perecehe de boxe Triangle Genesse Quartet. Dificultatea se pare ca acum incepe, odata cu alegerea sursei de muzica. Am incercat combinatia mai sus mentionata avand ca sursa un cd player de calitate, rezultatul fiind de exceptie, un sunet excelent. Am mai testat avand ca sursa un pc cu plata audio dedicata si la fel am obtinut un sunet foarte bun. Intre cele doua surse as opta pentru pc dim motive de complexitate, comoditate, etc. Oricum sunt formate audio care nu sunt mai prejos decat cd-ul audio, ba din contra. Experientele mele anterioare cu alte combinatii statie+boxe+pc au fost bune. Desi mi-ar placea sa merg pe o sursa mica si compacta, de genul mini pc, nu stiu daca in asfel de carcasa pot insera o placa audio dedicata. Astfel ca sunt intr-o dilema in ceea ce priveste pc-ul ca surasa de redare: mini pc sau de ex un sistem de tip htpc. Cum traim in era wifi-ului, am citit putin despre streamere si cam cum as putea sa redau prin ele muzica de pe un device (laptop, tableta, telefon etc), insa nu am testat aceasta schema. Totodata studiez si posibilitatea folosirii unui DAC. Dat fiind ca achitia sculelor de mai sus mi-a cam golit bugetul, nu as vrea sa mai investesc foarte mult in sursa. Astept sfaturile voastre in legatura cu alegerea unei surse potrivite.
  6. Ce m-ati sfatui sa aleg de pe pagina powerzone http://http://www.power-zone.ro/produse/_Subwoofer/, camera are vreo 20-25 metri patrati, receiverul e Denon 5.1 X520BT. Nou as alege ceva in genul: http://http://altex.ro/subwoofer-pioneer-s-21w http://http://mediagalaxy.ro/subwoofer-yamaha-yst-sw012 Dar ma gandesc ca ceva second ar putea sa fie mai bun decat ceva nou la acelasi pret nu ?
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