January Products: HiWave Wireless Speaker, Power Amp Kit, Wolfson DAC

HiWave develops new wireless speaker platform

HiWave offers a Bluetooth wireless speaker demonstrator that runs for 100 hours at normal levels from a single charge cycle.

HiWave Technologies, a provider of innovative audio amplifier ICs, full-frequency range speaker drivers, and next-generation haptic-touch devices, has developed a new product called Endfire. Endfire is an efficient wireless stereo speaker reference platform that delivers 100 hours of high-quality audio playback at typical listening levels.

Endfire uses Bluetooth to pair with tablet PCs, smartphones, and laptops and outputs 30-W audio from its two full-frequency range, wide-dispersion HiBM36S12-8 BMR speakers. These are combined with HiWave’s DyadBA3 module, which supports both AVRCP and A2DP Bluetooth audio profiles and uses the HiAS2002 stereo amplifier. The system is powered by three 2,200-mAh Li-ion batteries and charged via a micro-USB connection.

The reference platform consumes less than 300 mW during typical playback and its onboard HiWave HiAS2002 (Audium) amplifier can switch voltage rails to reproduce peaks without any detectable artefacts. The system automatically enters standby when not in use and waking. Device pairing and battery check are controlled via Endfire’s volume control dial.

The HiAS2002 amplifier IC and BMR speaker drivers are available from HiWave. Visit www.hiwave.com for more information.

 

Akitika’s complete stereo power amplifier kit

Akitika’s GT-101 contains everything you need to build a stereo power amplifier.

Akitika’s GT-101 is a complete stereo power amplifier kit that supplies everything but the solder. It produces greater than 50-W RMS per channel into 8 Ω with low distortion and low noise. The kit includes a toroidal power transformer, film, COG capacitors, metal film resistors, heavy-duty extruded aluminum heatsinks, isolated input jacks, double sided FR-4 PC boards, five-way speaker binding posts, and a fully regulated power supply. It’s contained in a black custom chassis. The component quality is characteristic of high-end equipment, at a cost of a little more than $300. Akitika’s GT-101 stereo power amplifier sounds better because you build it. Visit www.akitika.com for more information.

Caption: Akitika’s GT-101 contains everything you need to build a stereo power amplifier.

 

Wolfson’s newest DAC delivers great sound

Wolfson Microelectronics has introduced its latest stereo digital-to-analog converter (DAC), the WM8533, which provides audio performance in a small package for a wide range of consumer electronic applications.

The WM8533 delivers 106-dB signal-to-noise ratio (SNR) and features an integral charge pump, a software control interface, and offers 2 Vrms line driver outputs where a 3.3-V power supply rail is used. The WM8533 is suitable for a wide range of consumer digital audio applications including set top boxes, digital televisions, DVD players, and games consoles.

The WM8533 also features ground-referenced outputs and a DC servo to eliminate the need for line driving coupling capacitors and effectively eliminate pops and clicks at power on. The device also supports all common audio sampling rates between 8 and 192 kHz. For more information, visit www.wolfsonmicro.com.

Q&A: Andrew Spitz (Sound + Interaction Designer)

Andrew Spitz is a Copenhagen, Denmark-based sound designer, interaction designer, programmer, and blogger studying toward a Master’s interaction design at the Copenhagen Institute of Interaction Design (CIID). Among his various innovative projects is the Arduino-based Skube music player, which is an innovative design that enables users to find and share music.

The Arduino-based Skube

Spitz worked on the design with Andrew Nip, Ruben van der Vleuten, and Malthe Borch. Check out the video to see the Skube in action.

On his blog SoundPlusDesign.com, Spitz writes:

It is a fully working prototype through the combination of using ArduinoMax/MSP and an XBee wireless network. We access the Last.fm API to populate the Skube with tracks and scrobble, and using their algorithms to find similar music when in Discover mode.

The following is an abridged  version of an interview that appears in the December 2012 issue of audioXpress magazine.

SHANNON BECKER: Tell us a little about your background and where you live.

Andrew Spitz: I’m half French, half South African. I grew up in France, but my parents are South African so when I was 17, I moved to South Africa. Last year, I decided to go back to school, and I’m now based in Copenhagen, Denmark where I’m earning a master’s degree at the Copenhagen Institute of Interaction Design (CID).

SHANNON: How did you become interested in sound design? Tell us about some of your initial projects.

Andrew: From the age of 16, I was a skydiving cameraman and I was obsessed with filming. So when it was time to do my undergraduate work, I decided to study film. I went to film school thinking that I would be doing cinematography, but I’m color blind and it turned out to be a bigger problem than I had hoped. At the same time, we had a lecturer in sound design named Jahn Beukes who was incredibly inspiring, and I discovered a passion for sound that has stayed with me.

Shannon: What do your interaction design studies at CIID entail? What do you plan to do with the additional education?

Andrew: CIID is focused on a user-centered approach to design, which involves finding intuitive solutions for products, software, and services using mostly technology as our medium. What this means in reality is that we spend a lot of time playing, hacking, prototyping, and basically building interactive things and experiences of some sort.

I’ve really committed to the shift from sound design to interaction design and it’s now my main focus. That said, I feel like I look at design from the lens of a sound designer as this is my background and what has formed me. Many designers around me are very visual, and I feel like my background gives me not only a different approach to the work but also enables me to see opportunities using sound as the catalyst for interactive experiences. Lots of my recent projects have been set in the intersection among technology, sound, and people.

SHANNON: You have worked as a sound effects recordist and editor, location recordist and sound designer for commercials, feature films, and documentaries. Tell us about some of these experiences?

ANDREW: I love all aspects of sound for different reasons. Because I do a lot of things and don’t focus on one, I end up having more of a general set of skills than going deep with one—this fits my personality very well. By doing different jobs within sound, I was able to have lots of different experiences, which I loved! nLocation recording enabled me to see really interesting things—from blowing up armored vehicles with rocket-propelled grenades (RPGs) to interviewing famous artists and presidents. And, documentaries enabled me to travel to amazing places such as Rwanda, Liberia, Mexico, and Nigeria. As a sound effects recordist on Jock of the Bushvelt, a 3-D animation, I recorded animals such as lions, baboons, and leopards in the South African bush. With Bakgat 2, I spent my time recording and editing rugby sounds to create a sound effects library. This time in my life has been a huge highlight, but I couldn’t see myself doing this forever. I love technology and design, which is why I made the move...

SHANNON: Where did the idea for Skube originate?

Andrew: Skube came out of the Tangible User Interface (TUI) class at CIID where we were tasked to rethink audio in the home context. So understanding how and where people share music was the jumping-off point for creating Skube.

We realized that as we move more toward a digital and online music listening experience, current portable music players are not adapted for this environment. Sharing music in communal spaces is neither convenient nor easy, especially when we all have such different taste in music.

The result of our exploration was Skube. It is a music player that enables you to discover and share music and facilitates the decision process of picking tracks when in a communal setting.

audioXpress is an Elektor International Media publication.