More and more, we are seeing the prolific expansion and seamless integration of the stack. What does this all mean, though? Screen time now captivates us, while voice recognition and audio are blended into the user pathways of UX. Spurring from technology, we see popular apps like Evernote and iOS/Android natively adopting audio recording right within its inherent interface. These apps are taking in the voice user input to also drive UX — cleverly weaving experience, intention, outcome, commenting and moments.
Almost every sound you hear coming out of a speaker is digitally sampled and encoded. Moment upon moment of keynotes stored are recorded more, albeit in the format of video or audio, we are seeing an increasing number of unique use cases to why one would want to capture a particular moment. These moments offer an on-demand periscope — referencing a historic timeline of ripples in our experience, memory, and journey through work, life, play, and what matters most to us.
For much of our pleasures, sound is always in digital — whether it’s on your smartphone, computer, radio, television, home theater or in a concert hall. Today, across many electronic devices, audio recording is integral transition to many advanced features applied toward enhancing old ways of doing things. Just take a look at visual voicemail, and how recording voicemails took the next leap once UX and advance playback was offered. Visual and digital voice recording meshed with non-linear play, took voice playback to the next level. I’d go so far as to point out that most people never hear analog recordings anymore.
Unless you’re a musician, or live with one, virtually all the music you hear live or recorded is digital. We now see the integration of audio and voice recording into all forms of day-to-day activity. Audio with depth is helping bring back some of those analog qualities where the shape and length of a sound wave can be more defined by bit depth and bit sampling rate. With these 24-bit audio embedded designs and digital audio recordings, we can also achieve better sound quality more akin to what our ear can register and decode, help bringing forth the finer granular details of high fidelity. But it’s not all about just emitting fidelity via the digital audio recording. The use cases and need to record audio, albeit ourselves or surrounding interactions, is helpful for many use cases (musician during creative process, senior suffering stages of memory loss, students seeking catalog of lectures, author recalling and commenting wiring plots during writing process, etc.)
Why does bit depth matter, you ask? Bit depth refers to the number of bits you have when a device is capturing audio. Below is a graph showing a series of levels in how bit depth works. There are 65,536 possible levels for 16-bit audio. As for 24-bit, there are 16,777,216 levels. Now, let’s see how the depth is explained. The capturing of audio can be sliced in partitions at any moment in time such as shown in this graph. To move to higher resolution in audio, every bit added counts toward greater resolution. The deeper the bit depth, the number of levels stack greater audio information, layering richer context to the profile of the audio being recorded. Altogether, what’s said describes a segment of audio frozen in a single slice or moment of time.
The second integral “high quality” factor is called sample rate. Together, bit depth and sample rate complete the higher resolution audio model. The sample rate represents the number of times your audio is measured or “sampled” per second. The typical standard for CDs, the sample rate is 44.1 kHz or 44,100 slices every second.
Digital audio eliminated all of analog audio’s distortions and noise-related problems. In that sense digital is “perfect.” When analog recordings are copied, there are significant generation-to-generation losses, added distortion and noise; digital-to-digital copies are perfect clones. Some recording engineers believe digital doesn’t have a sound per se, and that it’s a completely transparent recording medium. Analog, with its distortions, noise and speed variations imparts its own sound. Arguably, perfect, it is not. This is why high resolution in audio paired with the best form factor and ease and usability go hand in hand.
As to whether digital composes sounds with better quality than analog, that’s merely a moot point. Digital audio recording and its very nature of having the ability to slice into segments and layer, then import into other applications and change into enhanced or analyzed into wave forms has been remarkable and pivotal for many industries. In fact, we now see results of digital audio having a significant impact when having the ability to vector to angular and distinct wave form shapes as to help identify voices and interpret intelligent voice recognition. These encoding factors coupled with deep learning programmatic layers are ushering in a new era of digital interpretation and digital recognition.
Despite such a proposal of questionable technical and audible merits, founder of Instamic Michelle Baggio apparently moved ahead with the idea and recently launched a well-funded Indiegogo campaign for a new audio and player designed to revive factors of instant usability and simplicity that has been squeezed out of digital recording. Thoughts and experience can now be easily captured or reduced to a series of moments, but it is in this very reason for being captured that one can traverse thoughts by memorable experience to episode, so we as users can stitch what’s most meaningful to formulate a mosaic of audio recordings to help serve a purpose. Whether it’s for applications in medical, academics, business, music or film, the list goes on and on… even a victim of memory impairment can find good use for Instamic.
Instamic isn’t just an ordinary microphone. It happens to be the smartest, smallest and most affordable digital audio recorder that is also easy to operate, combining usability with the smartphone. It attained over 2,500+ backers and crowdfunding exceeding 539% its original campaign goal. With that many backers and goals funded beyond expectations, there are good market/application factors yielding wider acceptance and adoption of more and more of these audio recording tools. Instamic can function as the day-to-day voice logging tool of choice.
We have now leaped into the “Recording Revolution.” GoPro had an effect on the video revolution, opening up a periscope and view into so many never before seen vantage points. Previously, only a number of people had access to seeing. Adventures and passions of people, shared from around the world into showcases for all to experience what they had seen. Giving an eagle’s eye into the experience of many, providing a viewport into those that would never have seen amazing video capture. The recording revolution is upon us and will grow. Instamic is a mic build and made for everyone. Not only is this recording device at 24-bit, the sample rate matches industry high resolution standards at 96khz sample rate. That’s right, based on the aforementioned bit sampling description, that puts the recording at high resolution of 96,000 slices of audio sampled per second.
Instamic records at 96khz/24-bit, having both mono and dual-mono while its Pro version even boasts stereo recording. This simple but advance digital recorder features omnidirectional polar pattern. Omnidirectional polar pattern records and performs ideally based on its small form factor. A peek inside reveals the architecture of quickly including minimal-phase digital filtering, zero-feedback circuitry, one of the “best sounding” DAC -nabled chips available with dual 2Msps, 12-bit DAC and analog comparator, and an all-discrete output buffer.
Instamic has the ideal form factor — it’s tiny and can be virtually attached to anything. As a standalone recorder, given the right price and origin of this idea, it can very well replace conventional handheld and lavaliere microphones. Packed with mounting options (magnet, velcro and tape) and a quick release clip, the super portable gadget can register hours of 48khz/24-bit sound in mono and dual mono mode, as well as in stereo quality with its Pro variant. A built-in, rechargeable battery allows for roughly four hours of uncompressed audio recording, with duration varying slightly depending on charge time, temperature and storage conditions.
Instamic has a frequency response of 50 to 18,000Hz. Try doing this with current smartphones or other devices, and batteries will drain quick. Then, recording is sensitive having a frequency response of 50 to 18,000Hz. Instamic crams big recording power into a small form factor which is highly usable because it can be tucked into anything. Simplicity seems to always rule the day especially when it comes to electronic devices looking to shape or better the way we do things in a day to day basis. What the GoPro did for cameras, this gadget wants to do for microphones.
Given its compact design and minimal setup, Instamic is the perfect accessory for filmmakers, journalists and musicians as they will no longer need to lug around all that bulky, obtrusive equipment. Eliminating the need for cables, the wearable unit connects to its accompanying app over Bluetooth and enables users to control it remotely within a 30-foot radius, as well as simultaneously record with multiple Instamics. What’s more, the mic has been designed with the latest Atmel | SMART SAM 70S MCU, comprising 2GB to 8GB internal memory.
Turning on the pocket-sized device requires a single tap of its logo, while another touch will begin the recording. From there, Instamic will automatically adjust the gain on its own in the first 10 seconds and will ensure that it remains at the optimal level. Tap and hold again for a second and it will stop. If paired with a smartphone, Instamic can also be controlled through its app. When a user needs to transfer a recording to their desktop, its microUSB charging port doubles as the file transfer system. Instamic comes in two models: Pro and Go. The Pro version’s waterproof, black shell makes it a suitable instrument for indoor filming sets, darker environments and even in five feet of water. Meanwhile, the splash-resistant, white Instamic exterior of the Go can remain inconspicuous in most bright, day-lit settings. Both can camouflage easily with custom design covers and handle the most windy conditions wearing Instamic Windshield.
How is this being done inside? Intrigued? You can head over to its Indiegogo page to delve a bit deeper. This Bay Area-based startup has already met its crowdfunding goals and now quickly developing their products with the Atmel SMART | SAM S70, a high-performance ARM Cortex-M7 core-based MCU running up to 300MHz. The MCU comes with analog capability, fitting 12-bit ADCs of up to 24 channels with analog front end, offering offset error correction and gain control, as well as hardware averaging up to 16-bit resolution. SAM S70 also includes 2-channel, 2Msps, 12-bit DAC.
But that’s not all. It’s combined with high-capacity memory with up to 2MB Flash and 384kB SRAM and DSP encoding capabilities (DSP functionality that can be further grown into its roadmap). DSP features can be broadly extended well into its product roadmap. Even more is to happen, inclusive in the roadmap is the SAM S70 MCU doing the encoding and decoding of the audio signals, enhanced with its ability to process deterministic code execution and truly expand on the stereo quality functionality packed with Omnidirectional polar pattern, providing the best quality mapping and single processing for an mcu, outputting workhorse processing power of an MPU. This 32-bit ARM Cortex M7 processor also features a floating point unit (FPU). Now with quality mapped to bit depth and bit sampling, the number crunching math required to compute an enormous layers of bits is astounding
The FPU further bolsters high quality audio by executing float point processing to render audio temporarily in a 32 bit floating point format. The recorders will render audio temporarily while the extra bits are added onto the file after recording to allow generous headroom for audio mathematics in the digital domain in memory. Before the file is output it will go through the 24 bit converters. “Floating point” scales the decimal point in a calculation and processing even more so. Furthermore, having 32 rather than 24 registers for calculations is going to render increasingly accurate result. With strings of only 24 numbers, it would be theoretically impossible to allow for other extensive calculations. Yet, when the data hits the 24-bit converter 8 bits are “truncated” or cut off. The said mathematical result is simply more accurate and as a result, we get high resolution output of the audio.
Instamic’s MEMS microphones offer a breakthrough innovation in sound sensing. Having sound recorded with an omnidirectional microphone response (similar to sound studio environments) is generally considered to be a perfect sphere in three dimensions. The smallest diameter gives the best omni-directional characteristics at high frequencies. Yes, indeed there’s always something new to learn. This is the compelling reason that makes the MEMS microphone the best mmni-directional microphone. Industry wise, MEMS microphones are entering new application areas such as voice-enabled gaming, automotive voice systems, acoustic sensors for industry and security applications, and medical telemetry. What was once unthinkable early on, the unique construction of the MEMs microphone combined with performance and form factor make it all possible.
Instamic Pro Features and Functionality
MEMS Microphone Specifications
Frequency Response Specifications
Comparisons at Scale
Once again, Instamic originally stems from the well-funded pool of contributing patrons. The community has supported and validated this product’s potential for an ideal application to market fit. With this said, the demand is real. Shoot for the stars, right? Powered by Atmel’s latest Cortex-M7, Instamic is looking to become a household name when it comes to capturing high-quality sound anywhere, at anytime, on anything.