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: New Standard for Universal Spatial Audio and 3D CodingPaper: Changes in Perceived Spatial Quality Influenced by Processor ChoicePaper: Building an Artificial Listener Evaluation System for Predicting Spatial QualityPaper: Optimizing Interchannel Coherence of Stereo and Surround AudioPaper: The Perceptual Effect of Vertical Layered Spacing in 3D Microphone Arrays137th Convention Report, Los Angeles57th Conference […]
This issue includes:Paper: The Influence of Stereoscopy on Movie Sound MixingPaper: Characterizing the Sound Attributes of Audio Quality AssessmentEngineering Report: A Computationally-Efficient Binaural Room Impulse Response SimulationEngineering Report: Open-Loop Active Loudspeaker Heat LimiterEngineering Report: Classification of Background Noise in Super-Wideband Telephony55th Conference Report, Helsinki56th Conference Preview, LondonFeature: Spatial AudioFeature: Current-Drive Audio AmplifiersFeature: Cinema CalibrationStandards and […]
This issue includes:Paper: Theory of Track Mixing for Multitrack Rock MusicPaper: Discriminating Spectral Alterations of Repeated Musical NotesPaper: Exploring the Relationship of Emotions and Timbre of Musical InstrumentsEngineering Report: Emulating Small Signal Loudspeaker Drivers for Amplifier TestingFeature: Forensic Audio AnalysisStandards and Information DocumentsNew Officers 2014/2015Review of Sustaining MembersCall for Papers: 138th Convention, WarsawSection News, Products […]
This issue includes:Paper: Centroid Manipulation Changes Discrimination and Identification of TimbresPaper: Robust Automatic Detection of Hum in Audio SignalsPaper: Coefficient-Modulated Allpass Filters Produce Dynamic Phase DistortionEngineering Report: Using a Field Programmable Analog Array to Implement a Voltage-Controlled FilterFeature: Live Sound System OptimizationCall for Papers: 138th Convention, Warsaw54th Conference Report, LondonSection News, Products and Developments, etc.
This issue includes:Paper: Synthesis of Spatially Extended Virtual Sources from a Mono SourcePaper: Filter Design Algorithm Using Magnitude PriorityPaper: Verification of the STI for the English LanguagePaper: Modeling a Loudspeaker Motor as a Fractional Order SystemPaper: Multichannel Downmixing with Reduced Spectral ArtifactsFeature: The Vinyl FrontierStandards and Information Documents136th Convention Report, Berlin137th Convention Preview, Los AngelesSection […]