Preview: Audio DesignLine
Audio DesignLine
Making sounds with analogue electronics - Part 5: Using analogue synthesis Part 5 of an excerpt from the book "Sound Synthesis and Sampling" begins by showing how a subtractive analogue synthesizer can be a learning tool for exploring some of the principles of audio and acoustics, and then looks at additive synthesis. View the full article HERE.
Mobile audio innovations coax big sound from small speakers Innovative DSP algorithms let mobile device manufacturers maximize small speakers’ acoustic power without incurring additional hardware BOM costs. View the full article HERE.
Generating spatial audio from portable products - Part 1: Spatial audio basics Part one of a tutorial on spatial audio introduces spatial audio reproduction and defines head related transfer function, crosstalk cancellation and audio beamforming. View the full article HERE.
Making sounds with analogue electronics - Part 4: Voltage-controlled amplifiers Part 4 of an excerpt from the book "Sound Synthesis and Sampling" looks at amplifiers as well as other modifiers, including LFOs, envelope followers, waveshapers, and modulation. View the full article HERE.
Hi-fi digital audio streaming comes of age This article examines some of the technology trends supporting high-end digital audio streaming. View the full article HERE.
Audio converter subsystem design in the 21st century – Part 1: Overview Most audio converter subsystems perform below the potential of their chosen data converter. Here, Ian Dennis of Prism Sound examines why that might be, and offers tips on how to achieve optimum audio converter performance. View the full article HERE.
Making sounds with analogue electronics - Part 3: Envelopes Part 3 of an excerpt from the book "Sound Synthesis and Sampling" discusses envelopes - the overall 'shape' of the volume of a sound, plotted against time. View the full article HERE.
Making sounds with analogue electronics - Part 2: Subtractive synthesis Part 2 of an excerpt from the book "Sound Synthesis and Sampling" begins a look at subtractive synthesis with a discussion of VCOs, waveforms, harmonic content, and filters. View the full article HERE.
Simple ways to manage different clock frequencies of audio codecs By proper reconfiguration of the digital filters, sample rate conversion and flexible clock frequency choices, a wide range of audio-video applications can be supported with modern audio codecs. View the full article HERE.
Making sounds with analogue electronics - Part 1: Before the synthesizer Part 1 of an excerpt from the book "Sound Synthesis and Sampling" looks back at the history of audio electronics before the synthesizer, briefly reviews the differences between analogue and digital synthesis, and discusses "one of the major innovations in the development of the synthesizer" - voltage control. View the full article HERE.
Selecting audio amplifiers for mobile devices This article examines several areas of improving audio in mobile phone and portable audio systems - many of which use a processor with integrated analogue audio outputs. View the full article HERE.
Op amps in small-signal audio design - Part 4: Selecting the right op amp (JFET-input types reviewed) In Part 4 of an excerpt from the book "Small Signal Audio Design," Douglas Self reviews the performance of some popular JFET-input op amps used in audio design. View the full article HERE.
Product How-To: 350W + 350W Class D power amp in the size of an iPod This article illustrates a Class-D amplifier design with a fully integrated control IC with application tailored power MOSFET, all in the size of an iPod. View the full article HERE.
Op amps in small-signal audio design - Part 3: Selecting the right op amp In Part 3 of an excerpt from the book "Small Signal Audio Design," Douglas Self examines various op amps and their key performance specs from a perspective of audio design. View the full article HERE.
Pro audio techniques applied in mobile devices to improve sound quality This article describes various techniques that can be applied to solve the challenge of achieving good sound quality from the small low-profile speakers in mobile devices, and how they can aid in improving communication as well as entertainment. View the full article HERE.
Bob Pease on audio The late Bob Pease spent many years writing (and speaking) about all aspects of analog design, and audio-specific issues were the focus on more than one occasion. View the full article HERE.
Op amps in small-signal audio design - Part 2: Distortion in bipolar and JFET input op-amps In Part 2 of an excerpt from the book "Small Signal Audio Design," Douglas Self looks at distortion in BJT and JFET-input op amps, and using rail bootstrapping to reduce common-mode distortion. View the full article HERE.
Op amps in small-signal audio design - Part 1: Op amp history, properties In Part 1 of an excerpt from the book "Small Signal Audio Design," Douglas Self reviews a brief history of op amps and then looks at various op amp properties from a perspective of audio design. View the full article HERE.
Digital audio relies on the features and benefits of IEEE 1394 This article argues that IEEE 1394 is the only interconnect proven to be able to support the bandwidth, timing and synchronization needs of pro audio applications. View the full article HERE.
Improving today's multimedia products with 3rd-party audio IP solutions This article argues that leveraging 3rd-party audio post-processing IP solutions can enable manufacturers to dramatically improve audio quality and differentiate their multimedia products, while reducing costs in this fast moving consumer segment. View the full article HERE.
Loudspeakers: Objective evaluations - Part 6: Other measurements In the sixth and final excerpt from the book "Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms," Floyd Toole considers other factors affecting loudspeaker performance beyond frequency response, including phase response, impedance, wire, damping factor and sensitivity. View the full article HERE.
Filter DC voltages outside your supply rails How to filter a bias, reference or even power-supply voltage effectively, only using circuitry that runs off a much-lower supply rail View the full article HERE.
Loudspeakers: Objective evaluations - Part 5: Professional monitor loudspeakers In part 5 of an excerpt from "Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms," Floyd Toole examines the objectives and measured performance - with examples - of professional monitor loudspeakers designed for use in recording studios. View the full article HERE.
Loudspeakers: Objective evaluations - Part 4: Measurements of real-world consumer loudspeakers Part 4 of an excerpt from "Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms" reviews the measured performance of some real-world consumer loudspeakers - some good and some not so good. View the full article HERE.
Enhancing performance and reliability in high-power Class D audio amplifier designs A highly integrated gate driver IC can have a significant positive impact on both the system architecture and audio performance. View the full article HERE. |
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