It promises some very nice features for a FREE software. Cant wait to try this one out!!! Tons of components and extensive libraries. The on-line library update looks interesting as well. I only hope that the simulation tool is as good as is the one from the non-free packages.
A JFET preamp for beginners. Simple yet elegant. Low noise.
The following is an example for a very simple and high quality JFET preamp. You can use this to amplify a very low signal sources. FET transistors are usually not used independently in preamplifiers. In most of the cases they are paired with bipolar transistors. Read More »
We have completed this module this week. It is a custom build by order of a customer. The module has many specific functions. It can be used for speaker protection, speaker delay, toroid soft start and others. Read More »
Well we all like and enjoy beautiful things of life. Art is a fine example. Engineers however are a kind of different animals. They enjoy looking at bizarre things. I do as well. What you see on the right is a fine example. A “painting” made out of electronic elements. Almost every possible type of electronic device is used and I think it’s amazing.
No deep thoughts about this. I’m not an art expert. Some might find it ugly, some might find it strange or whatever. I just wanted to share this with everybody.
If you like this be sure to check out this website.
Define Original and Reproduced musical and audio contents
In general we listen to musical performances in two basic ways. The first one involves an actual attending to real live music events (a concert, an opera, ballet music festival etc.). In this case the musical content we perceive is called ORIGINAL musical (audio) content (OAC), unlike the REPRODUCED musical (audio) content (RAC), which we perceive by using electronic and electro-acoustic devices. For the purpose of this article I will use the terms original audio content and reproduced audio content.
The reproduced musical contents are generally divided by two groups depending on the time we listen to them.
The first type is the so called synchronous audio contents. Those we get when we listen to any LIVE broadcasting over the TV, radio and live internet streams. This type of musical content is characterized by the fact that it occurs simultaneously with its original prototype but at a different place.Read More »
So it was a pleasant weekend. Just a few folks gathered together to listen to some good music. Well not only. It’s always about listening to something in particular and test it against something else. In this case one of the guys had brought his beloved CD player – the Unico CD Primo by Unison Research.
Well I had to say that I was rather suspicious about this testing. The first thing is that this CD player has a really good looking tube output stage. Having noticed that it was clear that this fellow has nothing to do with the neutral and transparent sound. However I kept my thoughts to me and we all sat down and listened. Read More »
Here is a very interesting video on how to test power supplies. There are four parts actually. The series of videos focus on using DC-DC buck and step-up power supplies by Texas Instruments. The techniques described however are applicable to any other manufacturer.
The first part shows some power supply testing fundamentals like setup overview, necessary equipment, proper connections etc.
Here is a very good schematic showing a tipical power amplifier grounding system. I have tried it ina many of my projects and it works every time. No hum, no ground loops no noise. Dead silent. Of course a proper power supply routing on the main PCB is critical. If done properly some very very high performance could be achieved.
The schematic was proposed by D. Self in his book “Audio Power Amplifier Design”. For any further info, please check out his work.
This issue includes:Paper: Detection of High-Frequency Harmonics in a Complex TonePaper: High-Quality Frequency-Shifting MP3 Compressed Audio SourcesPaper: Perception of Audio Quality in Popular MusicPaper: Using Fractional Derivatives to Model Viscoelastic Properties of Loudspeaker SuspensionsPaper: Auditory Adaptation Can Improve Localization AccuracyPaper: Method Biases Influence Audio Quality MeasurementsEngineering Report: Audio Algorithms Architecture to Enhance Spatialization of Stereo […]
This issue includes:Paper: Wave Field Synthesis of Moving Sound SourcesPaper: The Effects of Reverberation on the Emotionality of Musical NotesPaper: Automatic Bass Enhancement Controlled by Musical GenrePaper: Speech Enhancement Based On Wavelet TransformPaper: Modeling Musical Instruments for Real-Time Simulation Using Finite DifferencesEngineering Report: Detecting Voice Activity in Handset Applications Using Dual MicrophonesFeature: Recording in the […]
This issue includes:Paper: Feature-Based Analysis of Networked Musical PerformancesPaper: Comparative Evaluation of Sound Design Using Repertory Grid TechniquePaper: Audiovisual Spatial Coherence for 2D and Stereoscopic-3D MoviesPaper: Using a Virtual Bass System to Augment Small Loudspeaker PerformanceEngineering Report: Spatial Analysis and Synthesis of Car Audio Systems and AcousticsFeature: Psychoacoustics Meets EngineeringFeature: Loudness War in StreamingStandards and […]
This issue includes:Paper: Interchannel Time Differences Influence Localization in Median PlanePaper: Effect of Microphone Number and Positioning on Average Frequency Responses in CinemaPaper: Synchronized Swept-Sine Wave for Nonlinear MeasurementsPaper: Headphones Influence Localization of External Sound SourcesEngineering Report: 2D-to-3D Ambience Upmixing Using Perceptual Band AllocationFeature: Sound ReinforcementFeature: High-Resolution AudioStandards and Information DocumentsNew Officers 2015/2016Review of Sustaining […]
This issue includes:Paper: Using Volterra Series to Emulate Nonlinear SystemsPaper: Influence of Visual Appearance of a Loudspeaker Contributes to Quality AssessmentsPaper: Single-Ended Assessment of the Perceived Quality of Nonlinearly Distorted AudioPaper: Improved Calculation of Psychoacoustical Fluctuation StrengthEngineering Report: A More Robust Binaural Sound Reproduction SystemFeature: Music-Induced Hearing DisordersFeature: Digital and Multimedia ForensicsStandards and Information Documents58th […]