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Posts Tagged ‘Sound devices MixPre6’

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For a long time I have used Rode NT1a for nature recordings. It is a very good mic to capture the finest details in quiet soundscapes. But at the same time there is something missing in the sound quality, especially when it comes to low frequency and „audio depth“.
Last summer I got interest in IRT cross mic setup, so there was a perfect opportunity to invest in other microphones. There were not many mics to choose from with extra low self noise. Nevaton in Russia makes very interesting low noise & high sensitive mics. But my experience with MC50Quad was it did not capture the finest details of the silence as clearly as NT1a or MKH20. So I decided to invest in Lewitt LCT540s which I got for a acceptable nice price (See comparison)
I built a special shock mount for the LCT540s inside Rycote AE windshields (ORTF WS kit P/N:080210). That AE windshield is wider than normal WS windshield, especially made for stereo rigs so it is very good for large capsule, side address mics like LCT540s. Low handling noise is important for less rumbling wind noise and when it comes to LCT540, it is slightly better than NT1a.
Everything was ready for a field test in late Mars so I followed the silence into the country side. I was lucky with the weather, dry and calm, maybe too calm because it makes the silence too quiet for this field test. Anyway sometimes light gust gently wipes the top of trees and bushes which sounds fantastic in the headphones, moving slowly from left to right. It was much easier to feel the depth of the field with LCT540 than it has been with NT1a.
Nothing interesting was audible until in the early morning, about half hour before sunrise, when two Rock Ptarmigan started to „sing“. First in distance, but suddenly, maybe because of curiosity, they flied closer to the microphones and walked around the rig. The following recording is actually this moment.
It was recorded in IRT cross, which gives lot of opportunities in mixing. It gives me four different stereo recording in to four directions, all in NOS, plus many other versions too with different channel mix. It can be useful when looking into specific soundscape. It is for example possible to avoid traffic noise or other unexpected sounds from one or another direction.
The two first enclosed recording below have go through noise reduction process (above 3Khz). But the last one is a short peace without noise reduction, just as it comes from MixPre6, so you can hear the LCT540 self noise, which is about 2dB higher than in NT1a. It was recorded with 48dB gain and HPF at 40Hz. In post, I only normalize the gain level up to max, which rise the gain about +10dB. I did not change the EQ so audience can hear the sound quality at the low frequency. My feeling is that LCT540 have almost same low frequency quality as the MKH series & Nevaton which is very good
This is two versions of the same recording where I mix four channels differently into stereo. Counting channels 1-2-3-4 clockwise to L-R-Ls-Rs and the second one L-R-Rs-Ls (which is usually normal IRT setup).
This is a „high dynamic“ recording of silence, so I don´t recommend it played loud. It might destroy some speakers (ears too) if it is played too loud without attention.
Good monitor headphones are recommended or quality open headphones while listening at low to medium level.

Recording L-R-Ls-Rs
(mp3 256Kbps / 35,6Mb)

Recording L-R-Rs-Ls
(mp3 256kbps / 35,6Mb)

Short version of recording L-R-Ls-Rs without NR
(mp3 256kbps / 7,4Mb

Recorder: Sound devices MixPre6
Mics. Lewitt LCT540s (IRT cross setup) Running on 70m Sommer Mercator CAT7 S/STP cable
Pix: Canon EOS M50
Weather: Calm, dry, between -2 to +4°C, about 7:30 o´clock

Location: 64°40’23.7″N 21°37’43.7″W

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Imagine, It is 3:30, mid summer morning. You are within five kilometers from the arctic circle and two and a half kilometers from the north Atlantic ocean. It is calm, and dry and the sun which has never goes completely down this night, gives a silk smooth light through thin layer of clouds. The biosphere is remarkable. It is visible everywhere. From bugs in the grass, fish in the brook to the birds in the air or in the field. All living species seems to be busy to live in beautiful harmony with Mother nature,
You are located at Skinnalónsheiði (heathland) which is close to Hraunhafnartangi peninsula, northern most part of Iceland.
Just a few weeks earlier this place was frozen under ice and snow, extremely quiet and almost a lifeless place.
The following recording is quiet, even though it’s biological busiest time of the year. Bird songs and call’s are mostly in the distance, but sometimes something catches the attention, like the wriggling fish in the brook, or different uncommon songs from different bird species.
Background noise is mostly surf from the ocean two and half kilometers away or sometimes swarm of midges.
Many bird species are in this recording. Whooper Swan, European Golden-Plover, Common Ringed Plover, Whimbrel (European), Black-tailed Godwit (islandica), Dunlin, Purple Sandpiper, Common Snipe, Common Redshank, Parasitic Jaeger, Great Black-backed Gull, Arctic Tern, Red-throated Loon, Meadow Pipit, Snow Bunting, Rock Ptarmigan and Great Northern Diver, Great Black-backed Gull, Graylag Goose, Long-tailed Duc.
Another recording was made that same night several kilometers away, nearby Hraunhafnartanga peninsula. Listening here.
Quality open headphones are recommended while listening at low to mid level, or in speakers at medium level.

(256mbps mp3 / 74Mb)

Recorder: Sound devices MixPre6
Mics: Sennheiser MKH20 (AB40)
Pics: LG G6
Location: 66.513116, -16.149781
Weather: Calm, dry, light clouds, 11C°
Recording date: 29th of May 2018

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Remote islands are interesting places. Almost every island has it’s own ecosystem which can be interesting to record. One of those islands is Elliðaey, which is a part of Vestmannaeyjar islands, south of Iceland.
I got an opportunity to go there on a 24 hours trip with Bob McGuire, which is recording birds in association with the Cornell Lab of Ornithology, Macaulay Library of Natural Sounds.
I am not a specialist in the ecosystem in Elliðaey so I will not say much about it here. It is slightly different between each island in the region and the bird species can be different from cliff to cliff
Our main target in Elliðaey was European storm petrel and Leach’s storm petrel. Bob was collecting individual calls and songs but I was going to record hours of ambiances. The bird colony gives a strong smell as usual, but this island also has a strong smell of sheep. For decades there have been several landowners and farmers from Heimaey island who keep there several dozens of sheep during the summertime.
Puffins have been in a very difficult situation for many years, especially south Iceland and Vestmannaeyjar islands. Mainly because some annually rhythm changes in the ocean biosphere. That situation was visible in Elliðaey. Probably more than 50% of the Puffins burrows were empty and abandoned and dead chicks were also visible around.
Not all birds have difficulties and many other bird species also live and breed in the island; Atlantic Puffin, Manx Shearwater, Leach’s Storm-petrel, European (British) Storm-petrel, Great Black-backed Gull, Lesser Black-backed Gull, Herring Gull, Black-legged Kittiwake, Northern Fulmar, Common Eider, Common Murre, Black Guillemot, Common Raven, European Starling, White Wagtail
As soon as we arrived I quickly found locations for the recorders and then we walked around in the bumpy landscape for other locations. We were early in the breeding season, 4th of June, so we were even not sure if birds we were going to record, like European storm petrel, had already arrived. What surprised me most was the silence in the interior island. No sound from the ocean waves or cliff birds, only wing flaps from busy birds above our heads, mostly puffins. But there was also a low rumbling noise, which filled the air and was difficult to locate. It took me time to figure out what it was, but it was from ships somewhere far away on the ocean, so far I could not even see them in the horizon. This noise never stopped when I was awake. It was just differently loud during day and the night, and of course louder when ship passed close to the island.
The following recording was made just before midnight on a hill south of the hut in the island, located almost in the middle of a puffin colony.
It is mostly puffins wing flaps, when they fly over, landed close by the microphones and sometimes a „spray & splash sound“ when they poop
Later that night both Leach’s Storm-petrel, European Storm-petrel surprisingly arrived to the island. But that will be for another blog.
Quality open headphones are recommended while listening at low to mid level, or in speakers at medium level.

(mp3 256kbps / 60.3Mb)

Recorder: Sound devices MixPre6
Mics: Sennheiser paralell MKH8020/8040 in AB40 (4ch)
Pix. LG G6
Location: 63.466604, -20.176682
Weather: Calm, misty & light shower, ca 12°C

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Ásbyrgi has a fantastic soundscape. It is one of the wonders of nature, a forested horse-shoe shaped canyon in Oxarfjordur. Asbyrgi is a part of Jökulsárgljúfur, within the Vatnajökull National Park.
I was there recording over night for ten hours 1st. of June 2018 . I don´t know if it was the time of the year, or something else, but the cliffs were very quiet this night. Usually I have been there later in June and July and the Fulmar in the cliffs have been noisier.
It was around 8 o´clock in the morning, just before the tourist traffic arrived that the soundscape in the canyon changed. It was like the whole biosphere woke up with lots of birds and insects activity. The following recording is the last 30 minutes that day before the soundscape was ruined by traffic noise and yelling tourists. Several bird species are in this recording. Northern Fulmar, Common Snipe, Eurasia Woodcock, Whimbrel, Red-Necked Phalarope, European golden Plover,  Pink footed Goose, Eurasian Wigeon, Eurasian Teal, Redwing, Common Redpoll, and Snow Bunting.
Here you can also listen to older posts from Ásbyrgi: Fairy in Ásbyrgi and Botnstjörn pond in Ásbyrgi.
Quality open headphones are recommended while listening at low to mid level, or in speakers at medium level.

  (mp3 256kbps/62,3Mb)

Recorder: Sound Devices MixPre6
Mics: Sennheiser MKH20 (AB40 setup)
Pix: LG G6
Location: 65°59’56.6″N 16°30’44.9″W
Weather: Clear sky, light gust, 5°C

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Iceland’s electricity is produced almost entirely from renewable energy sources: hydroelectric (70%) and geothermal (30%). Less than 0.2% of electricity generated came from fossil fuels (in this case, fuel oil). In 2012 there was no wind power installed in Iceland. Electricity production increased by 24 MWh/person from 2005 to 2008, an increase of 83%.
According to Statistics Iceland the total electricity consumption was 7,958 GWh in 2002, 11,480 GWh in 2007, and 17,068 GWh in 2012. The aluminum industry in Iceland used 71% of produced electricity in 2011.
The electricity supply and consumption were equal in 2008: 53.1 MWh per inhabitant when the European union (EU15) average was 7.4 MWh. Iceland’s consumption of electricity was seven times higher than EU 15 average in 2008. The domestic electricity supply promotes use of electricity.
The Icelandic electricity market is geographically isolated. The market was closed for competition prior to 1 July 2003. Almost all electricity was supplied by Landsvirkjun and sold through regional distribution companies. Landsvirkjun had a monopoly position on investment in generation. Full market opening began in 2006 e.g. with the opportunity to switch supplier. Contracts for large scale energy users were in general long term, up to 30 years with options for extension.
Landsvirkjun, the largest electricity producer, had 76% annual production in 2007.The majority of the electricity is used in industry, mainly aluminium smelters and producers of ferroalloy. Landsvirkjun does not participate directly in the retail market for households and smaller businesses. In the retail market the main companies are RARIK, Orkuveita Reykjavíkur and Hitaveita Suðurnesja.The last two have also entered into the market for energy intensive users. The households heated with electricity, not many, receive subsidies to make their heating costs comparable to hot water heating. (Wikipedia) .
The following recording was recorded at Skóey island in Hornarfjörður fjord under a powerline “Byggðalína”. It is a 132kV powerline which connects all the regional and local electrical grids together and stabilizes the whole electrical grid in Iceland. The structure is in most parts over thirty years old and for the last several years it has been quite overloaded.
The recording was in 24bit/48Khz. Behind the aggressive electrical sound is a typical calm, quiet wetland soundscape with rumbling background noise from the ocean shore not far away and traffic.
When the recording is inspected in specrogram it shows the sparks fill the whole frequency spectrum of noise, or up to 24Khz (see picture). It would have been interesting to record this sparking sound at 192kHz because the whole microphone frequency range is up to 50Khz. That is not all, because the air is massively loaded with EMF/radiowaves, from 50Hz up to several hundred kHz. The strong radio signals travel long distances and make it almost impossible to record clean spaceweather signals with VLF receiver without human electrical noise pollution.

(mp3 256kbps / 55Mb)

Recorder: Sound devices MixPre6
Mics: Sennheiser MKH8020/8040 (Parallel AB40)
Pix: Canon Eos M

Location: 64.311677, -15.322010
Weather: Calm, Cloudy, drizzle rain. Temp: ca. 9°C

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World Oceans Day takes place every 8 June. It has been celebrated unofficially since its original proposal in 1992 by Canada’s International Centre for Ocean Development (ICOD) and the Ocean Institute of Canada (OIC) at the Earth Summit – UN Conference on Environment and Development (UNCED) in Rio de Janeiro, Brazil.[1] The Brundtland Commission, i.e. the World Commission on Environment and Development, provided the inspiration for a global oceans day. The 1987 Brundtland Report noted that the ocean sector lacked a strong voice compared to other sectors. At the first World Oceans Day in 1992, the objectives were to move the oceans from the sidelines to the center of the intergovernmental and NGO discussions and policy and to strengthen the voice of ocean and coastal constituencies world wide.
The Ocean Project, working in partnership with leading organizations from all sectors, including the World Ocean Network, Association of Zoos and Aquariums, and many others in its network of 2,000 organizations, has been promoting World Oceans Day since 2002 and together with World Ocean Network led a three-year global petition movement to secure official UN recognition. World Oceans Day was officially recognized by the United Nations in late 2008.[2]
World Oceans Day events are celebrated on 8 June, the closest weekend, the week, and the month of June. The day is marked in a variety of ways, including launching new campaigns and initiatives, special events at aquariums and zoos, outdoor explorations, aquatic and beach cleanups, educational and conservation action programs, art contests, film festivals, and sustainable seafood events. Youth have been playing an increasingly important role since 2015, including the development in 2016 of a World Oceans Day Youth Advisory Council (Wikipedia).
The following recording was recorded at midnight 29th of May in a wonderful weather nearby Hraunhafnartanga peninsula, close by the arctic circle.
Quality open headphones are recommended while listening at low to mid level, or in speakers at medium level.

(mp3 256kbps / 55Mb)

Recorder: Sound devices MixPre6
Mics: Sennheiser MKH8020/8040 (Parallel AB37)
Pix: LG-G6

Location: 66.52273, -16.03947
Weather. Calm. Clear sky. around 7°C

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I spend almost 4 days late June 2017 recording in Þjórsárver area, which is a tundra southeast of Hofsjökull glacier. It was shortly after the road administrator open the Sprengisandur route across the highland, so there was still not much traffic. It was very early this summer so it was possible for me to record birds activity in nests.
When I arrived at Eyvindakofaver I saw an Arctic fox sneaking around a stone cairns and an angry Snow Bunting flying around. It was a clear message for something interesting to record.
The weather was boring for recording. It was cloudy, the temperature about 4°C and the wind was SW, 5-10 m/sec. But the stone cairn was a suitable cover for the microphones. So I put up my gear and started recording just before midnight and then went to sleep.
At 3:40 the wind suddenly went down for about 30 minutes which was the only minutes with calm weather this four days in the area. Calm weather means normally better detail recording for the birds’ activity and deeper listening to far distance sounds.
Usually Snow Bunting lay eggs two times during the summer so this was likely the previous nesting time.
It is necessary to listen to the whole recording but suddenly something happens in the nest which we humans can guess was probably a brutal rape or other domestic violence.
If you think this was something else, feel free and leave a comment below.
Quality open headphones are recommended while listening in silence at low level, or in speakers at low level.

(256 kbps / 59,4Mb)

Recorder: Sound devices MixPre6
Mics: Sennheiser MKH20 NOS
Pics: Canon EOS-M
Weather. Cloudy, around +3°C, SW, 2m/s
Location: 64.613944, -18.575462

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